make xhr2 dependency for node env
make xhr2 dependency for node env

remotestorage/remotestorage.js,untitaker/remotestorage.js,lewisl9029/remotestorage.js,untitaker/remotestorage.js,mcanthony/remotestorage.js,remotestorage/remotestorage.js,lewisl9029/remotestorage.js,mcanthony/remotestorage.js,theWebalyst/remotestorage.js,theWebalyst/remotestorage.js,remotestorage/remotestorage.js