0.3.0 released

I uploaded 0.3.0 beta to sourceforge and updated the links on
bitcoin.org.  I still need to post the announcement message on the forum
and mailing list.  Here's what I've prepared:

Announcing version 0.3 of Bitcoin, the P2P cryptocurrency!  Bitcoin is a
digital currency using cryptography and a distributed network to replace
the need for a trusted central server.  Escape the arbitrary inflation
risk of centrally managed currencies!  Bitcoin's total circulation is
limited to 21 million coins.  The coins are gradually being released to
the networks nodes based on the CPU power they contribute.  You can get
a share of them just by installing the software and contributing your
idle CPU time.

What's new:
- Command line and JSON-RPC control
- Includes a daemon version without GUI
- Tabs for sent and received transactions
- 20% faster hashing
- Hashmeter performance display
- Mac OS X version (thanks to Laszlo)
- German, Dutch and Italian translations (thanks to DataWraith, Xunie
and Joozero)