Fixes #714. Removed custom implimentation of 4x4 matrix invert from Camera.java. Replaced with android.opengl.Matrix.java

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>
Merge branch 'master' into scenegraph
Trying to get camera visuals to display.

Signed-off-by: Jared Woolston <jwoolston@tenkiv.com>