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.

Add bookmarks property to git branch, it makes it consistent with other property
named closed branches. Makes git and hg API consistent

branch selectors: show closed branches too

It would be even better if they were fetched dynamically somehow and perhaps
placed in a sub sub menu ... but showing them in the list is often better than
not showing them at all.

vcs: fixed issues with calling get_changesets method doesn't
throws EmptyRepositoryError when called on empty repos

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

changelog pagination with branch filtering now uses
common logic that non branch filtered version.
- introduced CollectionGenerator object as a helper for
achieving abstraction layer on top of filtered results

after hooks cleanup we don't need to have ui injections into repo so we don't need to cache git repos
- change to @property fixes all odd concurrency issues with zlib decompressions

Switched handling of RhodeCode extra params in consistent way
- use only os.environ for both hg and git
- hacking ui objects was bad
- os.environ allows easier to call rhodecode hooks externally

avoid %r markup of unicode strings in user facing messages

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

avoid displaying repr of internal classes in user facing messages

The context of the message will tell where the problem was and there is no reason to show
... does not exist for this repository <MercurialRepository at /home/marcink/repos/rhodecode>

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

--version command should be safe, and bare no modifications
- improved subprocess calls error detection
- fixed I/O read on closed file errors

Don't cache dulwich Repos, in pararell multithreaded evniroment dulwich pack file openers
can break badly. We need to create Repo() objects always for each call, even when it's
taken from cache.
Fixed issue with dulwich filedescriptor leak ref #573

Implemented generation of changesets based
on whole diff instead of per file diff. That
can give a big speed improvement for large changesets in
repositories with large history.
- improved handling of binary files
- show renames of binary files
- implemented new diff limit functionality
- unify diff generation between hg and git
- Added binary indicators for changed files,
- added diff lib tests

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

Fixed validators for remote repos
- use proper httppeer repo for mercurial 2.3
- validate git repos for remote auth
- docs updates

fix for issue #417, git execution was broken on windows for certain commands.
Added git as requirement into readme.

Implemented pull command for remote repos for git
- added mimic ui objects into GitRepos to better handle hooks logic

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

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