Bug#842943: signap-desktop now built with electron

[Paride Legovini <pl@ninthfloor.org>]

Given how upstream (Moxie Marlinspike) opposed the redistribution of the
Signal Android app by third parties, and recently asked not to Debian
package libsignal-service-java:

https://github.com/signalapp/libsignal-service-java/issues/50

I suggest contacting him before doing any work towards the packaging of
Signal-Desktop, unless we want to work with an hostile upstream. In this
case, the least that would need to be done is renaming Signal-Desktop to
something else, and possibly changing its icon, as their redistribution
is considered a trademark violation.

Paride