[factorio_development.sh] Fixed switching back to development version in info file:

- The sed expression was a bit too trigger-happy in replacing version
strings used in dependencies.
- Bump the year in copyright notice.

[factorio_development.sh] Expand deployed files for new mods:

- Include stock text for a couple of sections in the README file.
- Mark build script as explicitly being released under a GPLv3
license.
- Include Emacs editor configuration file for setting the fill column
to a biter saner (larger) value.
- Include an empty control.lua file with helpful header stating
copyright and license (for easier copy/pasting from it).

[factorio_development.sh] Fix short usage instructions for release command:

- First argument is mandatory and has to be release version.

[factorio_development.sh] Make mod directory path optional for init command:

- Default to using the working directory as root.
- Bump the version, initial feature-complete release.

[factorio_development.sh] Include development script in mod directory during initialisation:

- Makes it simpler for people to use the scription without having to
fetch it from external location.

[factorio_development.sh] Use long options for git commands where available:

- Improves readability of code.

[factorio_development.sh] Added (personal) workaround for tag signing:

- Older versions of git (<2.23) do not have the tag.gpgSign
option. Try to emulate it by appending the --sign option if it is
set in git configuration.

[factorio_development.sh] Fix changelog updates and drop release archive when aborting the release:

- It is not possible to read from and update the changelog file at the
same time.

[factorio_development.sh] Added command for aborting the release process:

- Command cleans-up the local git repository from all release
artifacts.
- Pull out functions for fetching some basic information to reduce
code duplication, and refactor the exsiting code to use the helper
functions.
- Treat build configuration variables as globals.

[factorio_development.sh] Added command for releasing mods:

- Accepts mod version for the release.
- Tries to ease the process as much as possible, including updating
version numbers, tagging, and switching back to development
version.
- Include some comments in generated build configuration file.

[factorio_development.sh] Avoid switching directories within commands:

- Should make commands easily callable from within other commands.
- Avoid using the single quotes (don't -> do not) so Emacs syntax
highlighter/formatter would not get confused.

[factorio_development.sh] Added build command:

- Include default build configuration file during mod initialisation
to exclude development-specific files from the build process.
- Includes non-source files by default as well (such as README and
LICENSE).

[factorio_development.sh] Added initial implementation of Factorio mod development tool:

- Include basic script structure.
- Implement initialisation command for a new mod.

[TEMPLATE.sh.tpl] Switch to using upper-case names for global variables:

- Makes it easier to differntiate local variables in functions.
- Allows for avoiding "shadowing" of lower-cased/upper-cased variable
names by mistake in functions.

[factorio_manager.sh] Drop sleeps between instance launching when looping:

- For development purposes it is better to relaunch straight away to
reload things like prototype definitions, settings, and localisation
strings (for faster feedback).
- Even with 2-second delay, chances are that the user will miss to
actually get to terminal on time, and making it longer makes it more
annoying when developing mods.

[factorio_manager.sh] Added Bash completion for the script:

- Completion code is kept inline within the script itself, making it
easy to automatically generate it and include in Bash startup files.

[factorio_manager.sh] Added command for repeatedly launching an instance:

- Very helpful when developing mods that modify prototypes and require
instance restarts to make the changes visible.

[factorio_manager.sh] Drop non-jq variant for listing information, improve output:

- No need to complicate the script for non-jq variant.
- Extract as much mod inforamtion as possible from the mod's info.json
file.
- Use mod title for showing a friendlier (non-internal) name to user.

Noticket: [factorio_manager.sh] Add verbose output for info command:

- Lists mod URLs and their descriptions.

Noticket: [TEMPLATE.sh.tpl] Improve help output and tweak quiet/debug option processing:

- Introduce short and long help output. Short help includes only the
basic usage information, while long help provides full description
with all options etc.
- Short help includes only the basic usage, and should fit much more
easily on a single screen of output.
- Long help is only shown when script is invoked with the -h option.
- Output warning messages to stderr instead of stdout.
- Hide info and success messages if quiet output is requested.
- Introduce check for exclusiveness between the debug and quiet
options.
- Fix some smaller issues reported by shellcheck.

Noticket: [TEMPLATE.sh.tpl] Make sure to default the value for $1 positional argument when checking if it has been passed-in:

- Otherwise the shell script will error-out because the variable is
not defined.

Noticket: [TEMPLATE.sh.tpl] Update snippet syntax for latest(ish) YASnippet:

- Use correct syntax for dynamic values.
- Perform the necessary escaping for the YASnippet syntax.
- Introduces quiet and debug mode options.

Noticket: [TEMPLATE.sh.tpl] Fix a minor issue reported by shellcheck:

- Do not use $/${} on arithmetic variables (not needed).

Noticket: [factorio_manager.sh] Added commands for renaming and resetting the server map:

- Bumped the version as well.
- Added check for validating that a directory contains a server
instance.
- Minor cleanup of an extra blank line and variable assignment.

Noticket: [factorio_manager.sh] Disable checks for concurrent reading/writing to a lock file:

- Warnings will still trigger for 200>"$lock_file" lines, but
currently it does not seem possible to disable the check for those
lines only - unless the check is disabled for the entire subshell.

Noticket: [factorio_manager.sh] Expand checks for bool/int values to achieve better correctness of the code:

A && B || C in Bash is not equivalent to:

if A; then
B
else
C
fi

In fact, if A is true, and B is false, C will still get run.

In this particular case it's not a problem, but better to get rid of
it and have slightly longer code.

Noticket: [factorio_manager.sh] Use quotes around right-hand sides of operators:

- Right-hand side is treated as glob, so quoting is necessary to avoid
errors. For example, if var='[a]', then [[ $a == $a ]] will always
be false.

Noticket: Deduplicate locking code in Factorio Manager:

- Introduce helper function for cleaning-up any registered locks.
- Introduce helper function for calling flock that exits in case of an
error as well.
- Make existing code use the new locking function.

Noticket: Implement additional path validations for Factorio Manager:

- Added test for instance directories, new backup directories, backup
directories, and import sources.
- Refactored commands to use the new path validations.
- Updated some comments and formatting.

Noticket: Introduce dedicated function for picking Factorio version in Factorio Manager:

- Function is generic, and lets user pick the version more simply with
pre-defined defaults.
- Use the new function in "create" command.

Noticket: Introduce mechanism for validating common paths:

- Add support for validating game installations directory and new
instance directory.

Noticket: Clean-up set-game-dir command in Factorio Manager:

- Small refactoring and fixing of variable names and outputs.

Noticket: Refactor validation of server settings in Factorio Manager:

- Introduce dedicated validation function.
- Drop some unused variables.
- Validate settings while they are being prepared for the JSON file.

Noticket: Drop warning_prompt and bold_* functions:

- Introduce new function that handles promting for dangerous
operations and aborts if user does not confirm operation.
- Replace use of bold_* functions with colorecho function.
- Refactor colorecho and colorprintf to share associative array with
colors, and also support bold variants.
- Write documentation for the colorecho and colorprintf functions.

Noticket: Put a space around backup names in Factorio Manager when listing them:

- Makes it easier to copy/paste the backup name.

Noticket: Make Factorio Manager more robust by requesting all variables to be defined before use:

- Added missing server setting for port.

Noticket: Improve factorio_manager.sh server settings prompt handling:

- Use dedicated functions for colored output (colorecho and
colorprintf).
- Update function documentation to be a clearer.
- Declare all local variables correctly.
- Fix invalid setting type for
ignore_player_limit_for_returning_players.
- Validate user's input (should validate all settings even if user has
not changed them, but not implemented yet).

Noticket: Added initial version of Factorio Manager script

Factorio Manager supports:

- Multiple instances of Factorio with separate savegame files,
configurations etc.
- Ability to use multiple versions of Factorio itself.
- Ability to create, copy, remove, and import instances. Import is
limited to importing existing configurations etc from Factorio
installation directory.
- Manage instance backups.

Currently lacks full documentation and needs to be refactored quite a
bit.