When using init without setting the id<socketIODelegate> delegate on …

…initialization

The result is:

_queue = nil
_acks = nil

Which cause problems with acknowledgements.
Which implies that inorder to use the library you must initialize with a delegate.
Issue pkyeck#176

SocketIO.m

@@ -81,16 +81,25 @@ @implementation SocketIO
             heartbeatTimeout = _heartbeatTimeout,
             returnAllDataFromAck = _returnAllDataFromAck;
 
-- (id) initWithDelegate:(id<SocketIODelegate>)delegate
+
+- (id) init
 {
     self = [super init];
     if (self) {
-        _delegate = delegate;
+        _delegate = nil;
         _queue = [[NSMutableArray alloc] init];
         _ackCount = 0;
         _acks = [[NSMutableDictionary alloc] init];
         _returnAllDataFromAck = NO;
     }
+}
+
+- (id) initWithDelegate:(id<SocketIODelegate>)delegate
+{
+    self = [super init];
+    if (self) {
+        _delegate = delegate;
+    }
     return self;
 }