start qortal core from scratch with newest version

This script will 'refresh' the Qortal Core on the QORTector devices, it will remove the qortal.jar, db folder, and log files. It will then download the newest jar, and re-bootstrap.

refresh-qortal.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+cd
+cd qortal
+./stop.sh
+sleep 5
+rm -R db
+rm qortal.jar
+rm log.t*
+wget https://github.com/qortal/qortal/releases/latest/download/qortal.jar
+./start.sh