removed LibrePlanet stuff (moved to wiki presentations page)
Changes to adding/creating tags (show list of existing tags). Tagging permissions incomplete.
Only established users may tag
Merge github.com:strbean/snowdrift

Conflicts:
	Handler/Tags.hs
fix build error with tag permissions
Merge github.com:strbean/snowdrift
adjusted when . not to become unless
made alpha note more obvious color
minor wording changes
intro wording adjustment
Dependencies fixups.
Rethreading bugfixes - should be further tested
Merge branch 'master' of https://github.com/wolftune/snowdrift