Replaced from_header attribute of accounts with uri

Ignore-this: 6ade99cd3c4274d8d7037a44cae4e145

darcs-hash:20090618101418-1e3d8-35babcf1e64c19b5346816fcaf6dd32be5328aa6
Update MacOSX installation to use latest deps versions

darcs-hash:20090618150108-58252-6a7ecd57fc59344b0edd3349e6168f62cba6cc49