Changed patch file for mathic.  A test was failing.

It has been fixed upstream, so once we update to the newer version, this
will not be needed.
minor changes to personal build makefile
Merge branch 'master' of github.com:Macaulay2/M2
fix M2 script for cygwin

... where *.dll files have to be added to PATH, not to
LD_LIBRARY_PATH
changes to personal build makefile
ensure gmp is at least version 5
Merge branch 'master' of github.com:Macaulay2/M2
update INSTALL for SL
build libatomic_ops whenever building libgc
fix makefiles for static linking
Merge branch 'master' of https://github.com/Macaulay2/M2
stop package installation if interrupted

... during the running of an example in a subprocess
always build mpir, for now, so it can be patched
Merge branch 'master' of https://github.com/Macaulay2/M2