Added makefile to help package

Makefile

@@ -0,0 +1,17 @@
+# Makefile for MFRC522 library
+#
+
+all:	package
+
+help:
+	@echo "Please use \`make <target>' where <target> is one of"
+	@echo "  clean      to clean the project (e.g. remove process files)"
+	@echo "  package    to package the library (into a zip file)"
+
+clean:
+	rm ./MFRC522.zip
+	@echo
+	@echo "Clean finished."
+
+package:
+	zip -o ./MFRC522.zip ./MFRC522.h ./MFRC522.cpp