make the program installable

Makefile

@@ -0,0 +1,18 @@
+support_files := ${XDG_DATA_HOME}/bill-generator/
+config_files:= ${XDG_CONFIG_HOME}/bill-generator/
+install_loc := ~/.local/bin/
+install:
+	mkdir -p $(support_files)
+	mkdir -p $(config_files)
+	mkdir -p $(install_loc)
+	cp *.mm $(support_files)
+	# Copy the ident file but don't overwrite one that is already there.
+	cp --update=none ident $(config_files)
+	cp gen.sh $(install_loc)/bill-gen
+	printf "\nInstalled!\nUpdate your identity at $(config_files)ident\n\n"
+
+remove:
+	# Remove everything except the config files
+	rm -r $(support_files)
+	rm $(install_loc)bill-gen
+