Version -- please test!

Please test in preparation for the 0.3.3 release!  This build is looking good and should be the one that goes into 0.3.3.  I encourage you to go ahead and upgrade now if you're on Windows or Linux.

New features:
- Gavin Andresen's HTTP authentication to secure JSON-RPC
- 5x faster initial block download, under 30 minutes

Download here: