Adding new stack for joystick teleoperation. Including:

- joystick_core: base abstract class
- wiimote_teleop: wiimote implementation

include/iri_base_algorithm/iri_base_algorithm.h

 // Copyright (C) 2010-2011 Institut de Robotica i Informatica Industrial, CSIC-UPC.
-// Author Sergi Hernandez & Joan Perez
+// Author Joan Perez
 // All rights reserved.
 //
 // This file is part of iri-ros-pkg
@@ -377,7 +377,7 @@ int AbstractAlgorithmNode::ctrl_c_hit_count_ = 0;
  * \brief base main
  *
  * This main is common for all the algorithm nodes. The AlgImplTempl class
- * refers to an specific implementation of a generic algorithm.
+ * refers to an specific implementation derived from a generic algorithm.
  * 
  * First, ros::init is called providing the node name. Ctrl+C control is 
  * activated for sercure and safe exit. Finally, an AlgImplTempl object is