added git-update.sh

git-update.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+echo "This will git pull origin master, then update dependencies and default plugins."
+echo "Enter to continue, ctrl-c to stop."
+read
+
+git pull origin master
+pip install -r --require-hashes requirements.txt
+./onionr.sh reset-plugins