add venue json
addes controller actions for json, and adds a submission serializer
Merge branch 'master' of https://github.com/JBrianGordon/WhAttire into jamesbranch
Merge pull request #41 from JBrianGordon/brianbranch

add venue json
Merge pull request #42 from JBrianGordon/jamesbranch

Jamesbranch
makes categories appear more nicely on venue show page
Merge branch 'master' into kellybranch
not sure modifications to venuecategories made it before