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I've Mavenised your project for you. This makes it much easier for a growing portion of the Java community to use it.
Even better would be for it to be regularly distributed via. Maven Central; see http://maven.apache.org/guides/mini/guide-central-repository-upload.html for a guide.
My understanding is that this would require your project to be free software, though; that is, you'd have to remove your favorite clause from the license, which I guess won't be happening; a shame.
Also, the tests don't pass: Test.java:297 calls assertEquals(null, jsonobject.get("to"));, but get(String) asserts it's return value isn't null.