index.html communicates with echoserver/main.js

Conflicts:
	client/index.html

Conflicts:
	client/index.html
Add scaffolding for MassplayWS
Revert "Add scaffolding for MassplayWS"

This reverts commit 9b7252d944e6e5d4ab95e5ca795299127a516739.
Use websockets transport ONLY in client.js