Changes to get the MobileRobotroller sample working.
Extensions.cs had been moved.
Merge pull request #7 from hoppersoft/master

Changes to get the MobileRobotroller sample working on Android.
I'm accepting the change with the project references updated to the 'local' copy because that's how I tested it; I also need to manually make the **Extensions** update on the 'master source'; and then re-test pointing against that too.
Note, however, that I was able to reproduce the 'failing' behavior before this patch and a successful robot control after, so it does work :)