Moved test to an appropriate place

Ignore-this: 50f3972999b5a1aa200ccd7126798329

darcs-hash:20121017084806-56b4d-e31777807ccf5f43afd6316e49704099dce65e0d
Refactored streams and account relationship

Ignore-this: 3fa6c46d508a475cc53fad9d2e0a2331

Streams no longer get an account object on __init__
or any other function, they will always use the account
of the associated session

darcs-hash:20121017091103-56b4d-a388480d637373e202af96b382a7e2d97024c82b