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

implements #632,
- added branch/tag/bookmarks info into feeds
- added changeset link to body of message

- add loading message on lazy loaded toolips for journals
- fixed callbacks on admin journal

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

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

new tooltip implementation
- added lazy loading of changeset tooltips for journal data

Implemented #628: Pass server URL to rc-extensions hooks
- updated rc-ext docs

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

fixes #612 Double quotes to Single quotes result in 4; to 9; in a visual Diff. Markupsafe.escape method usage
was causing some unpredictable behavior

deleting a group now does same archive operation like deleting repositories. Improve prompt that show number of repos that will
be archived together with a group.

don't check for url issue links, since we always want to linkify changeset into a repo link, fixes issue
with issue_pat beeing disabled breaks the urlification

Update last_change from VCS data on request.
- lightweight dashboard shows now last_date also taken from db and it is fast !

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

Don't allow cherry picking changesets from the changelog using checkboxes.
Change pull request text that will indicate opening pull request against checkec changesets

fixes #591 git backend was causing encoding errors when handling binary files
- added a test case for VCS lib tests

Fixed #585, checks for status of revision where to strict, and made opening pull request with those revision impossible due to previosly set status.
Checks now are made also for the repository.

#590 Add GET flag that controls the way the diff are generated, for pull requests we want to use non-bundle based diffs,
That are far better for doing code reviews. The /compare url still uses bundle compare for full comparision including the incoming changesets.
- Fixed tests

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