Removes Guzzle connectors in favor of fXmlRpc connector
Adds guzzle stream dependencies, removes other guzzle dependencies
Updates connector usage in Supervisor
Updates connector usage in Process
Removes Iterator from Process
Removes ConnectorInterface
Removes functional testing
Removes setCredentials from the interface, handle it in your HTTP client
Updates local check, refactors tests, minor changes
Removes dummy connector test
Redesigns connectors
Adds fXmlRpc, removes Guzzle specific implementation