Add exception handlers in base API controller
Add exception handlers in base API controller

* For record not found returns a 404 response
* For wrong parameters returns a 400 response
* For other exceptions returns a 500 response

Flaburgan/diaspora,diaspora/diaspora,jhass/diaspora,Flaburgan/diaspora,geraspora/diaspora,SuperTux88/diaspora,jhass/diaspora,Flaburgan/diaspora,diaspora/diaspora,geraspora/diaspora,diaspora/diaspora,geraspora/diaspora,SuperTux88/diaspora,jhass/diaspora,Flaburgan/diaspora,diaspora/diaspora,jhass/diaspora,geraspora/diaspora,SuperTux88/diaspora,SuperTux88/diaspora