catkin: adding runtime dependencies on python modules

The catkin_make command requires a number of python modules.
catkin: adding runtime dependencies on needed build tools

catkin is a build tool based on cmake and requires the common
build tools to work properly.
catkin: adding python-misc as runtime dependency

The catkin scripts require the ast python module, which is shipped
with python-misc.
Merge pull request #101 from bulwahn/catkin-runtime-dependencies

catkin runtime dependencies