Added another response convinience method

It was becoming quite common that a need for setResponse followed by a
return response() was being used so added a method to do both for ease
of use.

Also renamed CryptoService to CryptoUtils since a Service name would be
confusing with the WebService name extension. Plus it is actually a
utility for working with RSA cryptography anyway. CryptoService will
still work for now but has been deprecated and will be removed before
version 1.0 is released (maybe even sooner then that).

A few other minor cleanups here and there.