Add @thebecwar and Ukikie to credits
Update debian building and this time do the icon stuff correctly
Follow up of #178

forget to switch picture here too...
Fix extension/feather related unittests
Allow import of .ogx videos (fixes #257)
Add travis.yml config
Add GUI support to travis
Cleaned up documentation folder.  Moved makefile.in so documentation won't build automatically.  Wrote linux documentation build script. Updated .gitinclude so documentation won't get committed to the repository.