Fix tilt close to surface in 3D. There is still the problem with zooming out when in columbus view.
Merge branch 'master' into tilt
Merge branch 'master' into tilt
Do not animate inertia when any mouse button is down.
Move min/max zoom distances to the screen space camera controller. Fixed tilt problem in Columbus view. Update tests.
Add additional tilt test.
Merge branch 'master' into tilt
Update change log.
Update change log.
Change minimumZoomDistance default back to 20.0.
Merge pull request #435 from AnalyticalGraphicsInc/tilt

Camera tilt