Add check to Makefile for scripts version mismatch

Makefile

@@ -1,15 +1,20 @@
 # Simple makefile to create a tarball of the msman helper scripts
+# Turn off verbose mode
+MAKEFLAGS += -s
 
 all:
-	source msman.sh
-	source .msman/version.sh
-	if [[ $CURRENT_SCRIPT_VERSION == $EXTRA_SCRIPTS_VERSION]]; then
-		cp -r .msman msman
-		tar -czf msman-hepler.tar.gz msman
-		rm -rf msman
-	else
-		echo "msman.sh and .msman/version.sh are not in sync"
+	CURRENT_SCRIPT_VERSION=`grep "CURRENT_SCRIPT_VERSION=" msman.sh | sed -e "s/CURRENT_SCRIPT_VERSION=//g"`; \
+	EXTRA_VERSION=`grep "EXTRA_SCRIPTS_VERSION=" .msman/version.sh | sed -e "s/EXTRA_SCRIPTS_VERSION=//g"`; \
+	if [ "$$CURRENT_SCRIPT_VERSION" != "$$EXTRA_VERSION" ]; then \
+		echo "ERROR: The version in msman.sh and .msman/version.sh are not the same!"; \
+		echo "ERROR: Please make sure they are the same."; \
+		exit 1; \
 	fi
+	rm -rf msman
+	mkdir msman
+	cp -r .msman msman
+	tar -czf msman-hepler.tar.gz msman
+	rm -rf msman
 
 clean:
 	rm -rf msman