Update dependencies and sbt version
Merge pull request #1 from joprice/updateDeps

Update dependencies and sbt version
Handle OAuth.ErrorClientNotFound consistently
Merge pull request #2 from joprice/clientIdMessages

Handle OAuth.ErrorClientNotFound consistently
Add onNotFound and onBadRequest callbacks
Merge pull request #3 from joprice/errorCallbacks

Add onNotFound and onBadRequest callbacks