Handle OB server daemon

ob.sh

#!/bin/bash

ARGS="start -d -a 0.0.0.0"

cd /home/pi/source/OpenBazaar-Server

if [ "$1" = "start" ]; then
	echo "OB Server starting..."

	rm -rf /tmp/openbazaard.pid
	python openbazaard.py $ARGS
elif [ "$1" = "stop" ]; then
	echo "OB Server stopping..."
	python openbazaard.py stop
elif [ "$1" = "restart" ]; then
	PID="$(ps aux | grep -i openbazaar | grep -v grep | awk {'print $2'})"

	echo "OB Server restarting..."
	if [ $PID > 0 ]; then
		kill -9 $PID
	fi

	rm -rf /tmp/openbazaard.pid
	python openbazaard.py $ARGS
else
	echo "No argument provided."
fi