Added 'user info' property to both classes.

IRCClient/IRCClientChannel.h

     for the channel */
 @property (readonly) NSArray *nicks;
 
+/** Stores arbitrary user info. */
+@property (strong) NSDictionary *userInfo;
+
 /**************************/
 #pragma mark - IRC commands
 /**************************/

IRCClient/IRCClientSession.h

 	it is not. */
 @property (readonly, getter=isConnected) bool connected;
 
+/** Stores arbitrary user info. */
+@property (strong) NSDictionary *userInfo;
+
 /***************************/
 #pragma mark - Class methods
 /***************************/