Removed files from the original source distribution

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

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
