added conformance tests.

tests should now pass
updated to jwcrypto that has proper callback delay guarantees and removed unnecessary setTimeouts

Updated all calls to jwcrypto to use the more intuitive API. Fixed a front-end test that was failing due to true asynchronicity of jwcrypto.

* Update the "stage_user" and "stage_email" to take a password where appropriate.
* Remove pass from calls to "complete_user_creation" and "complete_email_addition"
* Update database drivers to set the account password where appropriate.
* Update unit tests.

fixed check for site parameter, it should be an origin not a domain, and fixed all tests accordingly. Was careful not to screw up the verifier tests that are testing for old parameters to the verifier.

update wsapi_client to return errors in the standard node convention.  update all clients.  fix several areas in loadgen where we were not properly handling errors.  improve informational output of loadgen failures.  closes #838 - helps with issue #784 - closes #785

API CHANGES: stub a new auth_with_assertion api for authenticating to browserid with assertions generated from primary issued certs, and implement a failing unit test.  now lets make it pass