Added script for resetting Mailpile state on mac

scripts/reset-mac-mailpile.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+
+CLEANUP=Mailpile.$(date +%Y%m%d-%H%M).$$
+cd 
+mkdir -p $CLEANUP
+mv -v 'Library/Application Support/Mailpile' .gnupg $CLEANUP
+echo " "
+echo "Moved Mailpile and GnuPG data to: $CLEANUP"
+echo " "
+echo "Feel free to delete that folder if you are sure nothing"
+echo "important was lost!"