[factorio_manager.sh] Fix version extraction for Factorio 2.x:

- There are two lines beginning with the string "Version" - one is the
game version, while the other is the architecture
version (64-bit). This is a breaking change compared to the output
from Factorio 1.x.

[factorio_development.sh] Use Python 3 interpreter:

- Python 2.7 has been dropped from most distributions at this point,
and the old interpreter name will actually fail in most of them.

[factorio_manager.sh] Fixed loop interruption for the launch-loop command:

- Factorio has stopped returning non-zero value when stopped using
SIGINT (as of version 1.1.93).

[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.