Merge pull request #56 from brridder/master

Minor fix to prevent barfing on url scheme asserts

SocketRocket/SRWebSocket.m

@@ -266,7 +266,7 @@ static __strong NSData *CRLFCRLF;
     if (self) {
         assert(request.URL);
         _url = request.URL;
-        NSString *scheme = [_url scheme];
+        NSString *scheme = [[_url scheme] lowercaseString];
         
         _requestedProtocols = [protocols copy];