devdev2060

Merged in a bunch of patches from fangel and added support for RSA-SHA1 to the library.

There are still some gotches related to keys, they are marked in the code but for the moment you'll have to extend the OAuthSignatureMethod_RSA_SHA1 class in order to use it because the method for fetching your public and private keys is being skipped.

You can go test using the test client and test server

The keys being used are down at the bottom when RSA-SHA1 is selected as the current signing method.

As always, code is available at http://code.google.com/p/oauth/source/browse/code/php