Merge pull request #7 from mershack/master

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#5

The UserNavigation Controller is added
1. User can activate by pressing control key
2. We have kept 2 angles: angleY and angleZ
3. On the basis of the angles the camera moves with mouse moved. 
4. The up and down arrow used for going forward and backward.
#2
Following libs are added to the classpath for eclipse
commons-fileupload-1.3.jar
commons-io-2.4.jar
#5

Trackball code updated.
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