Merge pull request #352 from ros/cmi-pkg

add --pkg argument to cmi (#348)
Disable colors on windows until terminal_color can support windows.
CACHED option must be CACHE
comments in generated files for traceability
missing commas
Explained relay packages
Note to ROS users about non-global scripts
add --bump to catkin_prepare_release and remove comment output
Needed to put list into its own variable as it seems to fail to parse when used  properly when used as a liter value
enable cmi with multiple packages (#348)
Merge pull request #357 from tkruse/groovy_docs

fixes to documentation of catkin
modified windows checks from MSVC to WIN32
fixed debug message
modified comment
fix quoting of env variable on windows (#359)
avoid falling over on windows path slashes, use cmake ones instead (#359)
fix CMAKE_PREFIX_PATH handling (regression of cbfdf8a387f8101d2a2ef777944f65276a0a5a79)
update doc on CFG_EXTRAS (#353)
disable warning for data_files (#345)
modified another windows check from MSVC to WIN32