Don't require creating an account or password

[BryanQuigley]

To help increase usage of boinc let's remove the account requirement. Allow someone to download the client and contribute without create an account, giving their email, or a password. Each one of those items, adds steps some people won't do.

It may need machine accounts on the backend, but incentives to cheat, etc should really go away.

[davidpanderson]

I agree. It wouldn't be hard to implement. I think there should be some simple mechanism for such a user to connect to their account later on, and assign an email address and password to it. This would require a small change to the client and Manager.