Removed files from the original source distribution

mingw_sdl_include
src/gfx/bmp/bmp2pth.exe
release/macos
release/win32
vs2017_project

If you want to change the graphics, you will need to build and use
src/gfx/bmp/bmp2pth.c

You can also change the palette colors by building the ptclone_pal_editor
