Adding reasonable error message when WSGI app isn't specified.  Fixes #51.
Adding reasonable error message when WSGI app isn't specified.  Fixes #51.

arabenjamin/hendrix,jMyles/hendrix,hangarunderground/hendrix,jMyles/hendrix,hendrix/hendrix,SlashRoot/hendrix,hangarunderground/hendrix,anthonyalmarza/hendrix,jMyles/hendrix,andybak/hendrix,hendrix/hendrix,SlashRoot/hendrix,andybak/hendrix,arabenjamin/hendrix,JamesTFarrington/hendrix,JamesTFarrington/hendrix,JamesTFarrington/hendrix,andybak/hendrix,SlashRoot/hendrix,hangarunderground/hendrix,JamesTFarrington/hendrix,hangarunderground/hendrix,anthonyalmarza/hendrix,hendrix/hendrix