creates focus on-click
disables handlers after focus
completes flag init and mouse start and end positions
completes bind action listeners, passes in flags
adds scene to camera
creates new ellipsoid in setCamera
completes user control, adds keyswitch support for up, down, left, right
Merge pull request #4 from scottjason/user-control

completes user control, adds keyswitch support for up, down, left, right, forward, backward