Starting work on tag categories - creating tag categories via admin
Adding tag click count to Tag
Showing categories with click count
First tag categories plus their tags fixture
Delivering factors for tags/categories to the template
Filtering UI
Handling special case with zero clicks
Fixing template
Missing font size setting in the lower cloud
UI tweaking
Handling factors for uncategorized tags
Fixing ui for non categorized tag selected
Refactoring questions.views
Merge tag categories feature into master