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.

Use repo-scann at latest possible state.

- we can ensure every config/checks were made before that step
- it should fix issues with custom GIT paths

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

added initial_repo_scan flag for controll if repo scaning should be performed on every startup.
There's always paster repo-scan or repo scann triggered from admin pannel

config: automatically assign instance_id for host and process if it has been set to *

It is no longer a problem to invent new instance_ids on startup - unused keys
will be deleted.

Add git version detection to warn users that Git used in system is to old. ref #588
- also show git version in system details in settings page

added new suite of tests for VCS operations
- locking tests
- push pull tests
- added new ENV option to bypass re-creation of test enviroment

add option to disable whoosh index in tests via an enviroment variable.
- helps speed up testing, when whoosh is noot needed

Reverted delete zombie repos on server start, this can be misleading, and somehow dangerous option.
It's better that server restarts as fast as possible without any magical functions going on. Cleanup can be still made from rescan option in admin

Do cleanup on repo2db mapper
- fixed issue with install git hook function

utils/conf
- created temporary utils2
- made config.conf for storing some configurations
- fixed some dependency import problems
- code cleanup
- rc-extensions now properly work for celery

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

implements #212 moved default encoding variable into rhodecode-config. It's now possible to change
default utf8 to some other encoding.
- also added instance-id to config
- update ini files

- refactoring to overcome poor usage of global pylons config
- db transaction fixes
- fixed tests
- garden

Bumped sqlalchemy version to 0.7, replaced timerproxy with new event system for sqlalchemy.
TimerProxy is now longer valid profilling method for sqlalchemy

Major refactoring, removed when possible calls to app globals.
Refactored models to fetch the paths needed for scans from database directly
small fixes in base

Refactor codes for scm model
Some test updates, added test for admin user controller

Tests rewrite for 1.2 added some globals configs to make tests easier.
Fixed search index_location to take from configuration files now
fixed git http_user_agent bug

Moved out reposcan into hg Model.
Rewrote repo scann and caching of repositories, all is in hgModel.
Changed invalidate cache calls.
mergeds main repo list and repo switcher list into one new based on hgModel.

Code refactoring,models renames
cleaned up sqlalchemy sessions,
added cache support to most queries in models
fixed test.ini file