fixes issue #366 setting null on parent_group didn't propagate to actually db field.
- added relevant test for this

updated CONTRIBUTORS
- code garden

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

don't crash whole migrations if we cannot drop constraints. Those aren't so important. It might happen
than older versions of rhodecode don't have those.

Added session wrapper, for rc 1.2.X compatibility. Adds backwards compatability
for older RhodeCode sessions, created before 1.3 series.

implements #212 moved default encoding variable into rhodecode-config. It's now possible to change
default utf8 to some other encoding.
- also added instance-id to config
- update ini files

fixed issue with hybrid property for ldap_active
- some small fixes for cache_keys functions

speed up generating changesets in journal log
- using a range generator instead of get_changeset could speed up things a lot

API updates
- update_user will do lookup by userid param that can be id or username
- all params are required for update_user api call
- get_user/s will return ldap_dn param which is more correct

API: allowed password field to be null when used with ldap_dn ref #362
- added errors about non unique email to create_user api function

made upper menu always hover, looks nicer and produces less troubles
- added notification inbox into quick menu
- commented yet innactive compose message button

bumbed whoosh to 2.3.X series
- fixed some html issues on search results

changed warning log message for reading hgrc files, it was confusing. It's just an indication of the fact
that there is no such file...

API changes
- added removed_user_from_users_group function
- fixed errors on wrong username
- normalized add/remove members from groups functions
- docs updates

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

#227 Initial version of repository groups permissions system
- implemented none/read/write/admin permissions for groups
- wrote more tests for permissions, and new permissions groups
- a lot of code garden, splitted logic into proper models
- permissions on groups doesn't propagate yet to repositories
- deprecated some methods on api for managing permissions on
repositories for users, and users groups

garden
- unified logging formatting to use only %