Use standardized project structure

[HEdingfield]

I've been having trouble getting the Help button I'm working on to call up the config documentation txt file. It would help out a lot if we moved to a more standard directory structure like that used by Apache's Maven project. Here's a simple example of the layout in action.

@tarheel @moldover sound reasonable?

[HEdingfield]

I was researching Maven more, and it seems like migrating to this structure will allow us to build out tests, manage dependencies, and deploy more efficiently. It also integrates well with IntelliJ. Check out the quick video here.

[CalebKleppner]

This is above my pay grade, but if the 3 of you think this makes sense, I am fully supportive.

[HEdingfield]

If we convert to Maven, we can probably delete the libs directory.

[HEdingfield]

#239 is related, since we discuss migrating everything to Gradle.

[tarheel]

Converting to Maven/Gradle to own the libs.

[HEdingfield]

Gradle migration complete with #272.