Updates to rosjava message generation

[stonier]

Comparison of changes/updates needed between PR's #13 and #18. Both hit the transitive dependency issue and what's in #18 is great, it's cleaner.

• update the catkin_create wizard template with the updated msg generation api.
• update rosjava_messages' build.gradle.template with the updated msg generation api.
• implement the --package-path option for the java msg generator from Fix unofficial message dependency generation. #13.
• fix the bad version number checking pointed to by the TODO message in 3ee1817, it will break going from 9 -> 10.

[stonier]

I can help attack these and make sure all the sources are working on master. Let's talk early next week.

[stonier]

Created a new issue for the last one in #34