* voice-video-messenger: remove duplicates with instant-messenger
also move Tox and Jami to Instant Messengers, Change Jitsi to Jitsi Meet
* instant-messenger: remove platforms of Signal Desktop
https://github.com/privacytoolsIO/privacytools.io/issues/967#issuecomment-520268788
* instant-messenger: add indepedent security audits
* voice-video-messenger: mention that many are already listed above
* instant-messenger: fix formatting & mention features of Jami
* voice-video-messenger: list Mumble
* update source_code.md
* voice-video-messenger: fix card
* add Mumble.png
* Small revisions to the instant messengers
* Spelling!
* voice-video-messenger: add a warning on Jitsi Meet WebRTC
* instant-messenger: remove a from Jami
* instant-messenger: add VoIP badges
* Use updated label functionality
The labels/badges functionality added to cardv2.html in cbe5de4cc2d13d593b5f6d039a236a8b85fe0edd work better here.
* Fix Jitsi Meet warning badge
