Adapt to new Base64 contract 

```
Right now the auth code is broken with apache commons codec 1.4. See
https://issues.apache.org/jira/browse/CODEC-89.

You might want to change OAuthScheme.getHttpMessage

from

byte[] encodedHash = new Base64().encode(hash);

to

byte[] encodedHash = Base64.encodeBase64(hash, false);

```

Original issue reported on code.google.com by `Daniel.D...@gmail.com` on 14 Apr 2010 at 4:32
