* fixes for setup-tools.sh
fixes https://github.com/zokradonh/kopano-docker/issues/266
* add startup tests for meet demo
* add architecture to contributing file
* define ical_listen for kopano-ical
* precreate database if it does not yet exist
* fix spelling
* move docker-hub-helper in a general ci folder
* move installation of tools into dedicated script (will make it easier to use a different ci platform)
* mention the setup-tools script in contributing and move testing instructions in there as well
Felix Bartels