Remove almost all binaries and switch to maven project.

In detail:

* Remove most jar and gem files from build_lib, since they will
  be sourced via maven.
* Remove nbproject and allow NetBeans to open us as a Maven
  project.
* Remove build.xml references to build_lib binaries
* Remove some ant build targets that are no longer used and/or
  will not work without build_lib present.
Remove remaining binaries from build_lib.

* bnd is now sourced from maven.
* bouncy-castle-java.rb moved under gems/bouncy-castle-java/lib.
* jruby-win32-ole gem will get sourced from maven.

Additional tweaks to get jar-dist working.
Eliminate most references to build_lib.
Get dev gems installing properly with removed build_lib.
Move to @mkristian's proposed layout, with some modifications.
Remove Constants.java from src tree.
Merge remote-tracking branch 'refs/remotes/upstream/stripped_project'

Conflicts:
	pom.xml