* Adds initial documentation for sipgw jibri.
Also explains enabling the people search service and the request/response that are made around sipgw jibri service.
* Fixes add people dialog to invite users and rooms.
No invitation is sent when there is nobody to invite.
* Reuse some recording strings, by using arguments.
* Make sure web also dispatches CONFERENCE_WILL_JOIN.
* Introduces new feature videosipgw.
* Fixes lint errors.
* Renames methods to use people, chatRooms and videoRooms.
* Updates to latest lib-jitsi-meet (dc3397b18b).
Дамян Минков