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.

fixes issue #856 file upload >1000 bytes on windows throws exception.

The returned object is a true file object on POSIX platforms.
On other platforms, it is a file-like object whose `file` attribute is the
underlying true file object. We check if such object has a file attribute
which is missing on POSIX platform

fixes issue #860.

IMC web commits poisoned caches when they failed. We now
always invalidate caches so objects are refreshed and will be accessible.

Implemented simple gist functionality ref #530.

- creation of public/private gists with given lifetime
- rhodecode-gist CLI for quick gist creation

auth decorators are not used anymore on __before__
- this will allow to create a whitelist of API enabled controller functions
- moved around functions with _ to beginning of the files to make it cleaner

follow Python conventions for boolean values

True and False might be singletons and the "default" values for "boolean"
expressions, but "all" values in Python has a boolean value and should be
evaluated as such. Checking with 'is True' and 'is False' is thus confusing,
error prone and unnessarily complex.

If we anywhere rely and nullable boolean fields from the database layer and
don't want the null value to be treated as False then we should check
explicitly for null with 'is None'.

implements #636, lazy loading of history and authors to speed up page responsiveness.
- loading full history is not always needed, and it's very heavy operation. Now this is lazy loaded
when clicking on button

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

Let the function calculating changeset history do all the work
- fixed exception handling for fallback method

Fixed issue when node didn't exists at 'tip' and we tried calculate history based on that assumption.
Now fallback to the changeset the node exists in for history calculation

fixed issue with show at revision button. Some JS were not properly loaded due to ajaxified files view.
Removed JS code and the logic for that is in python view now. Simpler and less ugly JS callbacks

smarter calculation of showed associated changeset in file source view
- before rhodecode showed TIP changeset when initially displaing file source as description of associated commit
this can be misleading. Now smart calculate last commit of a file, and show specific commits when switching from history view

Calculate file history always from latest changeset to always show full history.
When doing the calculation from a particular changeset git doesn't any records from parent changesets

Reimplemented file-browser using partial-ajax
- improves the speed of browsing of files for revision
- url push state via html5 History
- also cache the results of calls for even faster handling the content

Bumped mercurial version to 2.3
- fixed issues with compare of two remote repos at particular revisions
- added tests for cases when mercurial update broke code and tests didn't catch this
- removed obsolete EmptyChangeset from the rhodecode code

moved login required into seperate calls for files due to optional API access option
for archives

removed JSON array envelope from filter files function
- switched to translation map for labels in file filter

fixes issue #455 Creating an archive generates an exception on Windows
- reverted the FileIter implementation as it had the same issue on windows and
probably on unix as ref #448

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

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

fixed raw_changeset for git, accidentally it was generated with hg patch headers
- Code garden

- added branch to history list for file
- fixed some inconsistency on file page when used mixed last_changeset with current changeset

implements #330 api method for listing nodes at particular revision
- improved filtering by files in file list

implements #308 rewrote diffs to enable displaying full diff on each file
- fixed escaping of html special chars in file editor

moved soon-to-be-deleted code from vcs to rhodecode
- diff lib
- annotate highlighter

Added handling of ignore whitespace flag in changesets
- fixed messages for FK validation

new files views
- compated space
- nicer gui
- code garden

fixes issue with mercurial 2.0 and archival of subrepos.
- Disable hooks when doing archive commandsvovercome mercurial problem of hook propagation to subrepos

fixed issues with python2.5
added compat module to rhodecode to have one point of fetching backward incompatible libs.