add unit test for float3/4 comparison
fix float3/4 comparison
add float3.cpp to AI/Wrappers/Cpp lib
correct AllowBuilderHoldFire, hopefully fixes #5213
fix build with gcc 6.1.1
update submodule pr-downloader
change to -fdiagnostics-color=auto
fix build issues with gcc 6.2.1 (archlinux)