Improved header CSS (removing some deprecated settings in typography.css.sass).
Added optional dropdown buttons to navbar items (Raids, Profile).
Removed unnecessary Characters#index > claimed/unclaimed Datatables (using :all instead).
Added Characters nav menu dropdown for admins.
Added bootstrap grid to standings#edit view.
Refacted Races & CharacterClasses controller/views for more streamlined editing.
Added integer_only numericality testing for Race/CharacterClass.blizzard_id field.
Added Bootstrap support to Character, Race, and CharacterClass views.
Added public/system directory to .gitignore.