Uninstall instructions

[Sjors]

I would be useful to have instructions on which files to remove to fully undo a make install.

[Sjors]

Looking at the install log, something like this:

sudo rm -rf /usr/local/lib/libmultiprocess.a \
/usr/local/include/mp \
/usr/local/bin/mpgen \
/usr/local/include/mp \
/usr/local/include/mpgen.mk \
/usr/local/lib/pkgconfig/libmultiprocess.pc \
/usr/local/lib/cmake/Libmultiprocess

That's a lot of files, so a make uninstall would be easier to use.