Increase Cmake deps , fix boost directory and make initial c++17 support
Cmake to 3.16 Qt to 5.15.0 Boost to 1.71.0 KF to 5.82 Fix boost include directory First steps for c++17 support
Cmake to 3.16 Qt to 5.15.0 Boost to 1.71.0 KF to 5.82 Fix boost include directory First steps for c++17 support