Change README

README.md

@@ -1,4 +1,10 @@
 # Custom Interface Package
-ROS2 Package for creating custom interfaces
+A ROS2 Package for creating custom interfaces, such as message, service and action files.
 
-Now under new rule
+## Installation
+Installing this package means copying the folder "custom_interfaces/" into your already _sourced_ colcon workspace, or by creating another colcon workspace and adding it to _.bashrc_ (`sudo nano ~/.bashrc`):  
+```bash
+cmd="$HOME/<patch_to_colcon_workspace>/install/local_setup.bash"
+source $cmd
+echo "ROS Overlay:        "$cmd
+```