Getting the Docker-related files from a remote repo + some code cleanup.

bigbluebutton-html5/.directory

bigbluebutton-html5/Dockerfile.test

bigbluebutton-html5/mod/event_socket.conf.xml

bigbluebutton-html5/mod/external.xml

bigbluebutton-html5/mod/tomcat7

bigbluebutton-html5/restart.sh

bigbluebutton-html5/setup.sh

bigbluebutton-html5/supervisord.conf

bigbluebutton-html5/tests/puppeteer/.gitignore

build_script.sh