implement responseBody modification base in application.
implement response modification (streamed and not-streamed).
override hasBody in streamed responses to true.
change Application into a trait.
add a localhost config to ease testing.
fix stupid bug in ForwardingRequestProcessor.
Reply to the correct actor.
simplify self reference.
rename sender to s to avoid confusion with member val.
simpler self reference.
actually call the done function.
buffer everything.
rename application to modifying proxy.
move RequestRouter into the routing package.
add ResponseModificatorChaining and clean up transferer.