update package documentation

README.md

-# robot_facial_expression
-## This repository contains an edited version of the baxter facial expression package. Facial expressions are customized to be used on a Tiago robot
+# Repo used to generate TIAGo Facial expressions
+
+#### "Most of the code is taken from the great work of  [Bilgehan NAL](git@github.com:bilgehannal/baxter_face_software.git)  on the Baxter robot" 
+#### 
+
+
+
+#### Package:
+- **face_builder** folder contains all the png images used to build the robot's face.
+- **launch** folder contains the ros launch file
+- **script** folder contains the code to build the face. Most of the code has been got from the work of Bilgehan NAL and just a few things have been edited or removed in order to get it working with the TIAGo.
+
+
+
+How to run it:
+
+``` 
+ roslaunch robot_face_expression robot_face_expression.launch 
+```
+
+To visualise the different facial expressions you have to run the [robot_face_visualizer](git@github.com:aandriella/robot_face_visualizer.git) node as follows:
+
+``` 
+ rosrun robot_face_visualizer face_visualizer.py
+```
+