Fixed bug in camera animation code.
Fixed bug in camera animation code.

When camera properties are databound, camera would get locked in position after
setting position with the viewcube. Error occured as storyboard continued to set
properties after move animation was complete.

discussion of solutions on MSDN
http://msdn.microsoft.com/en-us/library/aa970493.aspx

JeremyAnsel/helix-toolkit,lcouz/helix-toolkit,Iluvatar82/helix-toolkit,vidstige/helix-toolkit,0x53A/helix-toolkit,chrkon/helix-toolkit,aparajit-pratap/helix-toolkit,smischke/helix-toolkit,CobraCalle/helix-toolkit,huoxudong125/helix-toolkit,jotschgl/helix-toolkit,DynamoDS/helix-toolkit,holance/helix-toolkit,helix-toolkit/helix-toolkit