mavenize java-api and java-examples 

I setup the basic project for a mavenized build of the java api library and the java api example. I started looking at the other pieces (android, gwt, j2me, and blackberry) but it wasn't completely obvious how to quickly mavenize them. The structure for each should be similar to how pubnub-java and pubnub-java-examples were done where pubnub-java-examples depends on the pubnub-java project. Someone with detailed knowledge of these pieces could probably convert them quickly). I believe the all of the other modules would need to also depend on pubnub-java.

As mentioned previously, I'd rename this repo to pubnub-java. :) I also wasn't sure how you'd want to deal with the previous releases since those are usually tracked in git with tags instead of committing actual source. I removed those from source control.