rename CmakeLists and package files

CMakeLists.txt

 cmake_minimum_required(VERSION 2.8.3)
-project(robot_facial_expression)
+project(robot_face_expression)
 
 ## Compile as C++11, supported in ROS Kinetic and newer
 # add_compile_options(-std=c++11)

package.xml

 <?xml version="1.0"?>
 <package>
-  <name>robot_facial_expression</name>
+  <name>robot_face_expression</name>
   <version>0.0.0</version>
   <description>Edited version of the baxter_face package</description>