NOTASK test(pushHandler) added tests

- tweak the implementation for `pushHandler`
- add tests for `pushHandler`
Merge pull request #15 from ikhattab/test-push-handler

NOTASK test(pushHandler) added tests
test(really-js): websocket protocol

- add tests for websocket protocol
- update README for installation guide

closes REALLY-80

Conflicts:
	tests/protocol-spec.coffee