Fix problem with inertia, constrained axis, and mouse input that doesn't pick the ellipsoid.
Fix problem with inertia, constrained axis, and mouse input that doesn't pick the ellipsoid.

geoscan/cesium,CesiumGS/cesium,jasonbeverage/cesium,AnalyticalGraphicsInc/cesium,oterral/cesium,AnimatedRNG/cesium,jasonbeverage/cesium,soceur/cesium,kiselev-dv/cesium,NaderCHASER/cesium,oterral/cesium,denverpierce/cesium,AnimatedRNG/cesium,AnimatedRNG/cesium,NaderCHASER/cesium,AnalyticalGraphicsInc/cesium,kiselev-dv/cesium,omh1280/cesium,YonatanKra/cesium,ggetz/cesium,emackey/cesium,esraerik/cesium,NaderCHASER/cesium,omh1280/cesium,likangning93/cesium,ggetz/cesium,oterral/cesium,esraerik/cesium,CesiumGS/cesium,jason-crow/cesium,jason-crow/cesium,CesiumGS/cesium,esraerik/cesium,hodbauer/cesium,josh-bernstein/cesium,jason-crow/cesium,omh1280/cesium,progsung/cesium,CesiumGS/cesium,likangning93/cesium,josh-bernstein/cesium,CesiumGS/cesium,omh1280/cesium,soceur/cesium,YonatanKra/cesium,aelatgt/cesium,likangning93/cesium,geoscan/cesium,ggetz/cesium,ggetz/cesium,jason-crow/cesium,wallw-bits/cesium,denverpierce/cesium,aelatgt/cesium,emackey/cesium,kiselev-dv/cesium,hodbauer/cesium,esraerik/cesium,kaktus40/cesium,likangning93/cesium,hodbauer/cesium,kiselev-dv/cesium,aelatgt/cesium,likangning93/cesium,denverpierce/cesium,YonatanKra/cesium,emackey/cesium,YonatanKra/cesium,wallw-bits/cesium,kaktus40/cesium,wallw-bits/cesium,AnimatedRNG/cesium,progsung/cesium,soceur/cesium,emackey/cesium,aelatgt/cesium,denverpierce/cesium,wallw-bits/cesium