hammer: version bump
Added btsync group to btsync user
added group
Change umask
Moved UMask to correct location
Documentation update
Added group id to ids.nix
Changed group id to match user id
Merge pull request #5487 from luke-clifton/lc-btsync-group

btsync groups
Merge pull request #5481 from sjmackenzie/hammer

hammer: version bump