Even more garrison stuff.
Fix issues with setting and clearing followers.
Disable rare alerts while in garrison.
Clarify that rare alert is not only for Pandaria.
8.1
Attempt to fix a talent UI bug.
Update oUF tags + add missing tags.
Move garrison report button to menu bar.

Also rework button positioning system so they rearrange themselves
whenever a button's visibility changes.
Update oUF auras.
Merge remote-tracking branch 'upstream/master'