Full test coverage

This patch pre-release increases the test coverage to 100% which is a good starting point for the project.

Sessions containing user data are automatically handled in the construction of the Authenticator class. New logins are sent to the remote provider, with the correct encrypted request ciphers. Logins are automatically completed when returning from the remote provider, correctly decrypting response ciphers.

From now on, there are no new features planned before v1 release is made, which is expected to be within a week, while work is made on Authwave/provider.