Updates and bug fixes for applet, editor and shared library

-Fixed V3D resources not being updated to remote file system
-Fixed resource leaks in Database and loader
-Fixed bugs in LoadUI, MainUI, UploadUI, and AboutUI
-Changed commons-net JAR name and updated to Apache Commons Net 3.1
-Added seaglasslookandfeel JAR dependency
-Updated UI look and feel
-Added nav-bar text to applet
-Added callback controls to V3D image loading mechanism