More md5 function skeletons.
Adds messag pack regex.
Adds slingshot dep.
Adds dependency management functionality to messages.
This includes cycle detection as well as detection
of missing dependencies.
Adds md5 calculations.
Adds std_msgs to resources, so that Header usage will work.
Adds deprecated char and byte.
Fix package adding for 'Header' type.
Fix resource path for message test.
Fixed parse of messages starting with whitespace.
Update docs.
Merge branch 'md5' into dev