DDF-774 - Added Update Application webservice and update modal.

-Added a base modal class to the admin ui project.
-Created Update Modal to the UI.
-Created new method on the ApplicationUploadEndPoint class to handle the
update file upload call.  Should be similar to the create.
-Added support methods to the ApplicationFileInstaller that will extract a
version/applicatoinName from a zipfile based on the features.xml file
contianed within it.
If you use the latest ddf-parent that has Java 7 compiler target you could use the better resource management try.

http://www.oracle.com/technetwork/articles/java/trywithresources-401775.html