first cut at writing a websockets streaming client and server for test
purposes.
GWT based websocket sample, uses the samples/websocket-stream as a
server. Demonstrates cross-site access.
Update Readme to reflect new samples.
Fix up URL links in gwt20-websockets table entry.
Add README.md for websocket-stream sample.
Merge pull request #25 from simontuffs/master

websocket streaming sample, and gwt-20 client sample.