First step in two-part process to rename directories to kallithea.
This first step is to change all references in the files where they refer
to the old directory name.

Imported some of the GPLv3'd changes from RhodeCode v2.2.5.

This imports changes between changesets 21af6c4eab3d and 6177597791c2 in
RhodeCode's original repository, including only changes to Python files and HTML.

RhodeCode clearly licensed its changes to these files under GPLv3
in their /LICENSE file, which states the following:
The Python code and integrated HTML are licensed under the GPLv3 license.

(See:
https://code.rhodecode.com/rhodecode/files/v2.2.5/LICENSE
or
http://web.archive.org/web/20140512193334/https://code.rhodecode.com/rhodecode/files/f3b123159901f15426d18e3dc395e8369f70ebe0/LICENSE
for an online copy of that LICENSE file)

Conservancy reviewed these changes and confirmed that they can be licensed as
a whole to the Kallithea project under GPLv3-only.

While some of the contents committed herein are clearly licensed
GPLv3-or-later, on the whole we must assume the are GPLv3-only, since the
statement above from RhodeCode indicates that they intend GPLv3-only as their
license, per GPLv3§14 and other relevant sections of GPLv3.

Fixed issues with how mysql handles float values. Caused gists with
expiration dates not work properly on mysql.

synced vcs with upstream

- moved subprocessio module to VCS
- many small changes to make embedded vcs as similar to to external lib
- use only absolute imports
- patch vcs config during load pylons env

- Manage User’s Groups: create, delete, rename, add/remove users inside.
by user group admin.
In this case, a user's group can be owned by several people thru an owner user's group.

Some refactoring of naming, permission handling logic.
- remove some code duplicity as well as inconsistent naming

repository extra fields implementation
- verion bump to 1.6
- migrations

Added UserIpMap interface for allowed IP addresses and IP restriction access
ref #264 IP restriction for users and user groups

implemented #663 Admin/permission: specify default repogroup perms
- added migration that adds new default permission for groups
- merged with patch from Vincent Caron

Remove null from revision column as for comments inside pull requests to work properly
new migration adds column for future simpler main page

Deprecated validation of operating system, we just care if it's windows, let approve all other
systems.
- help to supports cases like cygwin etc
- fixed typo in auth decorator

added initial rc-extension module

- possible to store additional mappings for stats
- possible to overwrite and add to whoosh index extensions
issue #322
- post create repo hook callback
- post push/pull hooks callback

bumbed whoosh to 2.3.X series
- fixed some html issues on search results

fixes for release 1.2.4
- docs updates
- requires.txt file
- changelog

backported fixes for statistics from beta branch, try to fix issue #271
- version bump