v0.9.9 re-add contact discovery

0.9.9 (Feb 27 2021)

• Add github actions to automagically build fltapak and clicks and appimages on release(olof nord)
• Reenable starting new chats and check if your contacts are registered with signal(nanu-c)
• Install script for mobian (nuehm-arno)
• .Deb Packaging (nuehm-arno)
• Improve Logging on non ut (nanu-c)
• Update translation and contribution documentation (danfro)
• Update Czech translation (jato-p)