Create Makefile

Allows one to simply run `make install` to install BMC.
The Makefile will use `kpsewhich` to detect the correct destination directory.

Makefile

@@ -0,0 +1,15 @@
+TEXMFDIR != kpsewhich -var-value=TEXMFHOME
+BMCDIR := $(DESTDIR)$(TEXMFDIR)/bmc
+
+SOURCES := $(wildcard *.sty) $(wildcard *.cls)
+
+.PHONY: dummy
+dummy:
+	@printf 'Run `make -s install` to install BMC.\n'
+
+.PHONY: install
+install: $(SOURCES)
+	@printf 'Copying files to %s...\n' '$(BMCDIR)'
+	install -D -t $(BMCDIR) $(SOURCES)
+	install -t $(BMCDIR) LICENCE
+	@printf 'Done copying files. Run mktexlsr(1) to regenerate the TeX database.\n'