InsertFile JavaApplet changes

* signed java applet
* moved .class to .jar to sign
* added .crt file for import
* decompiled .class toi make changes in the applet
* removed some unnecessary code from the applet
* changed return value to a json string
* applet inclusion in js changed
* return values are now handled in the return method in js, no js will be called from within the applet
* renamed the applet

Change-Id: Ia989924e8f588a436b4a11a542c4ea9c0c841d72
Merge "InsertFile JavaApplet changes"