we don't need xvfb any more
disambiguate created_at order
add tag/taggings models & modifying methods on Question
add developer (lol) documentation
add a margin to the bottom of the vote controls to ensure a reasonable height
Ensure question body has some height in form
Use FactoryGirl to create question rather than manually creating it
Add the tag list to the question form

Includes a feature to ensure that the tag list is validated and that this is
represented in the UI.

Also fixes some features that filled in the question form and obviously failed
without including tag data. We have moved to using FactoryGirl for the data
used to fill out forms since it is easier than using differing strings across
the test suite
add support for tag import
add tags view to homepage
Merge branch 'tags'