Allow raising specific exceptions for rendering unauthorized/other responses
Fix erlang release number for travis.yml file
Change raising error to be easier and more readable
Merge pull request #196 from rcdilorenzo/elixir-0.13.2

Allow raising specific exceptions for rendering unauthorized/other responses
Merge pull request #197 from elixir-web/elixir-0.13.2

Merge elixir-0.13.2 into master