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.

#818: Bookmarks Do Not Display on Changeset View
- made the consistent order of displaying tags iconss

#818: Bookmarks Do Not Display on Changeset View
- made the consistent order of displaying tags iconss

shortlog: show all refs (bookmarks,tags,branches) in one dedicated column
- rename confusing name bookbook to booktag (as others similar names)

changelog / compare: adjust titles

Clarify what shows changesets and what more see changesets as revisions that
specify snapshots that are compared.

improved title consistency
- changed - into dots to save space

Multiple changes for compare system
- count number of changed lines and files
- add combined compare button into the old per changeset compare
- fixed some logic for remote & bundle compare system
- added few tests for git compare

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

Added h.tooltip to all places that tooltip_title is used.
- improved escaping of < and > inside tooltips

removed wrap paragraphs from commit messages as it broke formatting.
- commits are still properly formatted by css

code garden for changeset ranges and comments
- disabled (for now) comments on changeset ranges
- code reuse by mako namespaces
- added flag for enabling comments in diffs

replaced all decode('utf-8') instances with .decode('utf-8','replace') for more error prof setup,
this way rhodecode could handle displaying non utf8 encoded file paths. This is still an invalid path, but this way we could at least show those paths without errors

fixed unicode problems with file paths.
added feed arg to journal action mapper