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

feat: Enables by default tab sharing for chrome.

Update api.md. There is still work to be done, cause handling parameters in executeCommand is not currently correct and needs fixing. But for now displayname is the only command that requires a parameter.

Add 'build' dir to jshintignore

fix(PageReloadOverlay):Basic layout fix

Updates debian packaging.

Now the web app can be installed separately from jicofo and jitsi-videobridge, or can be installed on machine running nginx or apache. Currently only nginx will be configured and apache config is left to user. Later we can add and the apache config. Renames jitsi-meet to jitsi-meet-web (just the web content) and jitsi-meet-web-config (configuring jetty, nginx or apache). A new jitsi-meet package will be introduced, a meta package depending on jicofo, jvb and the current packages.

Sending unpin after clicking local video and unpinning remote.

Authentication buttons no longer belong to the Toolbar.

Fixes unpinning local user which is dominant speaker.

If we:
 - pin a remote and click it, unpin is signalled.
 - pin a remote and the click another remote, the new one is pinned and signalled.
 - pin a remote and then click local. UI pins local, but unpinning remote is not signaled, fix addressed with this commit.
 - pin/unpin local, nothing is signalled.