Update to org.netbeans.html @ 0.7

Hi.
I'd like to update the html-json project to use the most recent version of the Html for Java library. There are two changes:

1. I've made the Html for Java library a NetBeans.org project. Thus the groupId change.
2. I've implemented most of the functionality in the project iself. Thus I could delete all org.json related code.

Other than that there are just dependency version updates (like grizzly 2.3.8 to match the one Jersey is using). 

Btw. I've published the version 0.7 via maven.java.net today, it is not yet in maven central. Waiting for its propagation may be necessary before accepting my pull request.