moved amr packages into new amr directory
added amr_ui dependencies
added examples of using common ros message  in c++
added examples of using std ros message  in c++
added examples of using common ros message  in python
added examples of using std ros message  in python
added examples of class based ros node  in c++
added examples of simple ros node  in c++
added examples of class based ros node exampels  in python
added simple ros python node example
added example1 and example2 of creating python node to demostrate usage of reusablity of source code
added a package to demostrate the initial condition of catkin package
added python package exmple to demostrate a skeleton of ros python package
added coding convention guide from robotcup documents
added a method to call other message preparing methods
added ros pubisher and subscriber demo codes
added examples to show demo of launching multiple nodes