Update README.md
Revert "Update README.md"

This reverts commit 044ac18594eab273424d0bec00a178d2a5ebaf61.
Merge remote-tracking branch 'upstream/master'
cake binary should be run from the app directory, otherwise it will throw errors. Also, this approach is advised by Cake documentation.
Merge pull request #33 from theqwertman/master

Resolution for issue: Ratchet.websocket start throws "Plugin Ratchet could not be found"