header interface was reduced, compiler warnings removed.
properties. Note for Vojtech: Review src/libslic3r/Fill/Fill.cpp once again, add test for G-code generator properties (extrusion speed, cooling?) Fixes Modifier slice/move efficiency #1005
The XS was left only for the unit / integration tests, and it links libslic3r only. No wxWidgets are allowed to be used from Perl starting from now.