New heartbeat server to monitor

[amboxer21]

Currently the heartbeat monitor for the commands server is being monitored but the remote viewer server is not. This server/port needs to be added to the heart.py script. This server however cannot be checked like the commands server with a simple ping. Instead, if connecting to the remote viewer server fails, we should send a signal to the commands server to reboot. Also, a custom handler to the android app will be needed. It should say re-initializing while the RPI3 is rebooted. I removed any GUI functionality upon booting from the RPI3, so the boot process should be fast!