add waffle.io badge
Put Waffle badge on the same line as build badge.
Merge branch 'waffle-iron-master'
Remove link to Trello board.
Move files in handler/ to handler/v1/.
Move files in handler/ to handler/v1/.
Update JWT logic to work with new JWT library release.
Merge branch 'refactor' of github.com:hackedu/backend into refactor
Handle errors with httputil.HTTPError.
Use the context package and reorganize packages.

* Use Google's context package for request-state information.
* Reorganize packages to flatten structure and make more sense.
Use CORS middleware with Negroni.
Merge pull request #27 from hackedu/refactor

Refactor and improve code quality