Update README.md

Author: k-okada

jsk_pepper_robot/README.md

@@ -4,8 +4,8 @@ jsk_pepper_robot
 setup environmnet
 -----------------
 ```
-mkdir -p catkin_ws/semi/src
-cd  catkin_ws/semi/src
+mkdir -p catkin_ws/src
+cd  catkin_ws/src
 wstool init src
 wstool merge -t src https://raw.githubusercontent.com/jsk-ros-pkg/jsk_robot/master/jsk_pepper_robot/pepper.rosinstall
 wstool update -t src
@@ -14,6 +14,13 @@ catkin_make
 source devel/setup.bash
 ```
 
+Make sure that you have NAO_IP environment variable and PYTHON PATH to your NAOqi Python SDK path. So your `.bashrc` would be
+```
+source ~/catkin_ws/devel/setup.bash
+export PYTHONPATH=$HOME/pynaoqi:$PYTHONPATH
+export NAO_IP="olive.jsk.imi.i.u-tokyo.ac.jp"
+```
+
 running demo
 ------------
 ```