Blow away existing tagging setup.
Add migration, concern, and models for rebuilt tagging system.
Rebuild most tag routes, tag helpers, and tag views.
Use File.join instead of string interpolation for URL helpers.
Change .empty? to .blank?
Change HTMLable to Redcarpeted. Resolves #18
Rebuild tagging system! Thanks, @h0tl33t!
Re-add tags to RSS feed. #20
Re-add posts and links to tags#show. #20