please mention about the dep: cmake_common_scripts

[Fetullah Atas]

I build this on Ubuntu 20 but there is a dep which I couldn't see being mentioned in readme for build instructions.

https://github.com/ros-industrial/cmake_common_scripts

Perhaps it will be better to have linked it in readme .

[Joseph Schornak]

I added an entry to the list of dependencies in the readme in #66.

As a side note, cmake_common_scripts is now named ros_industrial_cmake_boilerplate.