Libpolygon can provide its own includes via target_include_dirs PUBLIC.
This means any linking targets do not need to specifiy them manually.
As common requires polygon, the polygon dep is also now no longer
required downstream of libcommon, as it's transisitvely implied
by libcommon's target_link_libraries.
This resolves a circular dependency previously detected and also
simplifies CMakeLists.
It was added when refactoring the SHAPE_POLY_SET class, ande replace any use of CPolyLine class inside Kicad code.
the CPolyLine related code is now not used.
So this test nowadays makes no longer sense.
* Add more missing source code licenses.
* Fix coding policy violations (tabs and trailing white space) in Python
scripting code.
* Add stable release policy to full documentation build.
John Beard
jean-pierre charras
Jeff Young
Wayne Stambaugh
Lorenzo Marcantonio
Dick Hollenbeck
raburton