Installing and updating valetudo on Gen3 devices

This is a preliminary instruction on installing RE to Gen3 devices (including T6/S6, M1S, T4/S4 and others).
Note that you'd need valetudo RE version 0.10.0 or later for this.

As there are known difficulties for installing custom firmware to newer devices, currently the suggested way for installing Valetudo RE is the following:

1. root your device and install vanilla valetudo using dustbuilder or some other image building software;
2. make sure vanilla valetudo is working as intended (at least you should be able to see the map from the device);
3. replace current valetudo binary with RE version, which could be accomplished with the following commands put into ssh console of your vacuum:

cd /mnt/data/valetudo			# move to a directory with enough free space
wget <URL of latest valetudo.tar.gz>	# download a new RE binary
tar zxf valetudo.tar.gz			# unpack RE binary from the TAR archive
/etc/init/S11valetudo stop		# stop currently running service
mv valetudo /usr/local/bin		# replace current binary with a new one
/etc/init/S11valetudo start		# restart the service

This should get you a RE version running on your device.

To update RE to the next release, you'd just need to simply repeat the step #3 again.