Prepared release 2.0.21
fix policy version for ubuntu
Update Ubuntu port to 2.0.21 and the latest Ubuntu SDK

This updates the Ubuntu port to use the latest Ubuntu SDK components
and creates a new release of version 2.0.21. As location support works
now reliably on Ubuntu for a while, that has been enabled in the
Ubuntu too.
Merge pull request #136 from mzanetti/master

Update Ubuntu port to 2.0.21 and the latest Ubuntu SDK
Updated BlacjBerry World ChangeLog