Vogon Latest Code

Code Clean up and Added intermediate Code to get graphical Nodes from Diagram

Removed @override and added a null check to avoid null pointers.

added jersey dependency to hit quadriga and also check the user access rights

Updated to give login information at time of opening a valid remote workspace

Added username and password fields to the launch screen

view service diagram creation in progress

changes for progress model for threads

Changes for avoiding infinite loop while downloading empty vocabs and concepts

Changes for saving url, workspace id and path in properties file