Mac packaging: migration to Oracle Java 7 packager

Fixes pull request #5. Thanks Marian Bouček.
Fixed path for gateways on OS X

-- gateways is inside of bundle and user.dir is not set to bundle anymore
-- proper way for getting resources from bundle is calling FileManager.getResource()
-- also catches some Oracle's bugs in original Apple Java implementation
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/esmska/integration/mac/MacIntegration.java

MacIntegration Apple Java fix is better than proposed so I rewrite my changes with upstream.