Fixed bug with incorrect URL when base URI with trailing slash used.
Fire onConnect event when connection established

In the SocketIOClient, `onConnect()` never called `mHandler.onConnect()`
Fixed crash on a no-argument message

If a message from the socket.io server is emitted with no arguments, it
now is properly received
Merge pull request #4 from bkase/fix_noargs

Fixed crash on a no-argument message
Merge pull request #1 from FilipZawada/master

Fixed a bug with incorrect URL when base URI with trailing slash is used.
Merge pull request #3 from bkase/fire_connect

Fire onConnect event when connection established