Add a simple Makefile to make install/uninstall galyleo

This should help make the uninstall/install process a bit more
straightforward during upgrades on production systems. And may simplify
the use of Spack to install and maintain galyleo as a package on systems
like Expanse and TSCC.

Author: mkandes

Makefile

@@ -0,0 +1,22 @@
+PREFIX=${HOME}/galyleo
+DESTDIR=
+
+INSTDIR=$(DESTDIR)$(PREFIX)
+INSTLIB=$(INSTDIR)/lib
+
+all:
+	@echo do nothing. try one of the targets:
+	@echo "  install"
+	@echo "  uninstall"
+
+install:
+	test -d $(INSTDIR) || mkdir -p $(INSTDIR)
+	test -d $(INSTLIB) || mkdir -p $(INSTLIB)
+	install -m 0755 -D lib/* $(INSTLIB)
+	install -m 0755 galyleo $(INSTDIR)
+	@echo Run galyleo --configure after install
+
+uninstall:
+	rm -rf $(INSTDIR)
+
+.PHONY: all install uninstall