iTunes Connect/TestFlight requires these now and is not satisfied with
empty values anymore.

Now that Apple have approved build 1.1.185 for release in the App Store,
the short app version needs to be incremented; otherwise, no new builds
can be uploaded to TestFlight and, respectively, for release in the App
Store.

Simplify the source code (with the idea that source code which does not
exist does not have to be maintained).

Additionally, apply modifications to have the source code comply with the coding
style.

Overall, prepare saghul:audio-mode for merge into jitsi:master.

Now that Apple have approved build 1.0.178 for release in the App Store,
the short app version needs to be incremented; otherwise, no new builds
can be uploaded to TestFlight and, respectively, for release in the App
Store.

The launch screen appears not centered and/or clipped on certain
devices. Unfortunately, I cannot reproduce it when I deploy the app to
devices and Simulator from Xcode 8.1. It may (or may very well not) be
that the Xcode version matters and the enterprise build server does
appear to use an older Xcode version.

LaunchScreen.xib compiles locally with Xcode 8.1 but the enterprise
build fails. A possibility is that the enterprise build machine is
running an older Xcode version.

As a step toward merging jitsi-meet-react with jitsi-meet to share as
much source code as possible between mobile and Web, merge the part of
jitsi-meet-react's source tree which supports mobile inside the
jitsi-meet source tree and leave jitsi-meet-react's Web support in the
source code revision history but don't have it in master anymore because
it's different from jitsi-meet's Web support. In other words, the two
projects are mechanically merged at the file level and don't really
share source code between mobile and Web.