Update README.md (#1)

simple intro

README.md

@@ -1,3 +1,32 @@
-# ArenaROS
+Arena Camera deriver for ROS
 
-Arena SDK development on ROS
+
+## Getting Started
+
+### Prerequisites
+* Ubuntu-16.04 xenial
+* ROS kinetic
+* ArenaSDK binraies
+
+### Basic Setup
+#### Environment for ArenaSDK 
+
+```shell
+echo "export ARENA_ROOT=<ArenaSDK binaries root folder>">> ~/.bashrc
+echo "export ARENA_ROOT=<ArenaSDK binaries root folder>">> ~/.zshrc
+source ~/.bashrc
+source ~/.zshrc
+```
+
+#### Workspace
+Copy the included image_encoding.h to your ROS include folder after 
+backing up the old one (if existed). The custom image_encoding.h is
+included to enable streaming support for LUCID’s Helios camera.
+```shell
+sudo cp -f \
+    /opt/ros/kinetic/include/sensor_msgs/image_encodings.h \
+    /opt/ros/kinetic/include/sensor_msgs/image_encodings.h.bak
+sudo cp -f \
+    <Repo root folder>/catkin_ws/inc/image_encodings.h \
+    /opt/ros/kinetic/include/sensor_msgs/image_encodings.h
+```