Added generators support to server.method()
Added ability to register plugins via yield
Added ability to use generators as plugin register
Added ability to use generators inside plugin api (plugin.route, plugin.method, etc)
Added generatos support plugin.dependency() and plugin.ext(). Also added support of 'yield plugin.register()'
Added ability to use Pack.compose() with yield
Added ability to use state.prepareValue() with yield
v0.0.2