Use default installers from platform definitions
Remove OS_DEBIAN from gbp generation

This was removed in favor of keeping supported platforms listed in the yaml file as described in REP 137
fixup circular dependency
Merge pull request #1 from ros-infrastructure/cottsay-master-fixup

fixup circular dependency
Fix installer vs installer_key
Fix command order in .travis.yml
Add rosdistro to .travis.yml as it is in setup.py
Use alternate import syntax
Merge pull request #302 from cottsay/master

Fedora support for catkin packages in gbprepo