Demo project updated

I have just updated the demo project, because I detected a bug in the example number 10, which was not rendered properly. However, the component itself has not changed and, consequently, the binary package has not been modified.

The new demo and sources package has been changed to version 0.9.1.beta, and you can download it here.

Please, let me know if you find bugs or you have ideas to improve NiftyDotNet.