Unicode fixes for RPM generation

Includes debian generation fixes for
32305ba99a0eddb106c75b97dcd2c559af0769bb and
f213ec199c7a47e5ed1ce4ce695d723a65fd13d2 and fixes
https://github.com/ros-infrastructure/bloom/issues/196 for RPMs as well.
Merge pull request #261 from cottsay/master

Unicode fixes for RPM generation