2.2.0-rc2

[NEW] Dependency loader will retry fetching additional resources if they fail to load

[CHANGED] Refactored internals to reduce main file size by over 1KB
[CHANGED] Improved heartbeat handling for HTTP transports
[CHANGED] Removed wssHost and httpsHost options, reverted to a single domain regardless of encryption
[CHANGED] Added extra 1s to the cached transport timeout
[CHANGED] Updated the stats protocol

[FIXED] MozWebSocket is not assigned to WebSocket anymore
[FIXED] Socket listeners are always unbound after closing the connection