Separate disconnect overlay

The variables in gradle.properties can be overridden on command line like: -Pversion=1.

Reduce the impact of aui, aui-experimental, and jQuery-Impromptu on t…

Update api.md

Fix videoConferenceJoined and videoConferenceLeft event names

Adds the --host argument to the jicofo command, as suggested by exs on irc.

Add 'isNetworkFailure' argument to PageReloadOverlay

There was functionality added to lib-jitsi-meet that depends on
particular version of Strophe. It could be possibly broken without
testing the update.

Fix disabled Welcome page broken with the introduction of React

The React-based rewrite looks whether there's a room name (in the
window's location) in order to choose between WelcomePage and
Conference. But app.js expects Conference to be rendered before it
builds a room name if WelcomePage is disabled and there's no room name.
A quick and dirty workaround is to render Conference within WelcomePage
so that the rendered result closely resembles index.html before the
React-based rewrite.

Log more details on page reload

Log collector

Fix the UI when anonymous domain auth is in use