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.

Don't use -p flag together with -s in git calls. Latest
git version changes behaviour of such call changing the output.

In all the calls where -p -s was used we're only interested in
list of changesets and not the diff.

fixes issues #849 IMC failed for non-ascii files

- added set of regression tests into vcs lib

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

avoid %r markup of unicode strings in user facing messages

Improves
Revision u'b7f4...' does not exist for this repository

made git refs filter configurable ref issue #797
- default --all was kept and --branches --tags (or even other variations) is possible to use via .ini file

fixes #652 switch to generator approach when doing file annotation to prevent huge memory consumption when executed on large files. Thanks to ALexey Larikov for patch.
- added pure dulwich method for getting file history.

Implemented file history page for showing detailed changelog for a given file
- fixed git detection of filenode history when executed on directory
- shortlog uses urlify_commit function now

implements #649 added two seperate method for author and commiter to VCS changeset class
- switch author for git backed to be the real author not commiter

fixes #625 Git-Tags are not displayed in Shortlog
- improved git extraction of git tags if they are associated to a commit
- added not implemented tags() function for git changesets

fixes #630 git statistics do too much work making them slow.
added/changed/removed methods didn't use generator methods to return the list of changes
- added test for that case

new dulwich based implementation of added/modified/removed
functions for GIT changeset. Much faster some test up to 70% speed
improvements. Pure awesomeness !

re implemented affected_files function for git using dulwich
it speeds up things like 70%

Implements subrepos view inside filebrowser
- fixes issue #434: Error when accessing files or changesets of a git repository with submodules

various fixes for git and mercurial with InMemoryCommit backend and non-ascii files
- hg use tolocal for unicode objects
- git use core.quotepath=false for commands

temporarly fixed git _get_id_for_path problem in vcs.
Will iterate later while there's a nicer fix.

Git fixes
- removed remotes from git-branches
- fixed parsing for git node history
- docs updates