* 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
* tune .editorconfig for the existing files
* fix reported linting issues
* travis: switch language to node_js to be able to run npm
* travis: build on ubuntu bionic
* have a separate ldap container for demo data
* add question to setup.sh about demo users
* make ldap container switchable
* piggyback small fixup for search failing when starting directly after kopano-server
fixes#53
