LLBSDConnection dealloc causing EXC_BAD_ACCESS error

[onnlv]

[self invalidate]; in - (void)dealloc method causing EXC_BAD_ACCESS while deallocating LLBSDConnection object.

I think it's pretty straightforward since the invalidation will be processed through dispatch_queue asynchronously after the deallocation.

https://github.com/ddeville/LLBSDMessaging/blob/master/LLBSDMessaging/LLBSDConnection.m#L68

Thanks for the great framework by the way.