module for simulating and testing network calls

 Test::LWP::UserAgent useful for testing PSGI applications, for simulating a
 server so as to test client code, route some or all requests through the
 network as normal, but still gain the hooks provided by this class to test
 what was sent and received.
 .
 Note that LWP::UserAgent itself is not monkey-patched - use this module (or
 a subclass) to send request, or it cannot be caught and processed.