Add stop after init

the user is a member of docker group is already a prerequisite

Adapt script so that it can handle versions numbers like 1.9.0

Note: Not using logger since it doesn't seem to work

docker dev start: default to using host network instead of docker one (still available as an option)

start: add path for addons directory that can be different from odoo bin path. try to give it a reasonable value, it is the one from that work in our docker, but it can be changed with an environment variable