Adding controller side logic for d3 implementation
Adding query and some pieces of d3 code in preparation for d3 implementation
Merge pull request #35 from bobolinks-2014/css

Css
Added d3 stacked bar graph
Merge branch 'master' of https://github.com/bobolinks-2014/FlipSide into d3
Pseudocoding d3 implementation
Added d3 bar graph to user profile
Merge pull request #36 from bobolinks-2014/d3

D3
Merge pull request #37 from bobolinks-2014/css

Css
added better error handling to category#make_pair
refactored a bit
Merge pull request #38 from bobolinks-2014/pairing-fix

added better error handling to category#make_pair
optimized user pair matching
split up rake tasks
added from_last_six_hours method to Category
Merge pull request #39 from bobolinks-2014/pairing-fix

Fixed some bugs with making pairs.
making changes. bold. pairing return value fixed
merge