Since msysGit lacks the install command, simple cp -f replacement
is provided. Don't forget to copy it into the msysGit bin subdirectory.
Introduced CLEAN_BUILD=NO make option to test packaging w/o cleaning.
Recommended for test builds only, not for production run.
make -j works great after PyMite dependency fix by commit
0005729056
So comment is updated as well.
USE_BOOTLOADER now deprecated and removed.
Scripts are moved into the same subdirectories like in msysGit.
Added make.sh script (for advanced usage scenario).
Few misprints are fixed.
