add echo server to the app
Convert socks-rtc to use new core.tcpsocket API
Re-add trace in echo server.
Merge branch 'master' of https://github.com/uProxy/socks-rtc

Conflicts:
	Gruntfile.coffee
	package.json
	src/rtc-to-net/rtc-to-net.json
	src/socks-to-rtc/socks-to-rtc.json