Calendar Bundle

Basic calendar functionality. Using of this (or any) bundle may be frustrating without an auto-complete feature. I had wanted to add an About attribute to the bundle to circumvent that issue. I will do it as soon as I get some time. That is more informational and should not affect the functionality.

We may also want to consider wrapping a c++ library (like boost) for creating some of the functionalities.
Cheers
Srini