consolidate finding files relative to the pants working directory into PantsUtil methods\n\nTesting Done:\nRan test suite, ran pants target on birdcage.\n\nReviewed at https://rbcommons.com/s/twitter/r/1393/\n
Deduplicate library data when generating library dependencies
Merge branch 'master' into notifications

Conflicts:
	src/com/twitter/intellij/pants/PantsManager.java