Update: Version 3.31.4 is out now. This version is now based on the Signal code base as LibreSignal is no more.
Signal now supports WebSockets so it is usable fully without GCM (PlayServices).

So this version introduces several new features:

• GIF Support
• Voice Messages
• Call support should work (though it might not ring on incoming calls)
• Attachments now shows the image gallery with images to quickly use as attachment
• QuickScroll Up/Down Feature
• Overlay showing the Date of chat messages when scrolling up
• Timed Messages (Selftimer that destroys message after read and given delay)
• Hint showing unread messages in chat window
• Video support
• Support for website distribution build with auto-updating APK (though this will rename the app from LibreSignal to Signal and won't ship timebomb removal and other patches)
• New Base Signal 3.31.4

This new version requires you to reregister after upgrade. Chats and History will be saved on upgrade but it will not allow you to send Signal Messages before reregistering. Reregistering works only by phone so SMS step will be skipped (with the usual error message)

Of course this version comes with the usual Patches for SailfishOS & BlackBerry to skip SMS registration (as it is non working on Android Runtimes) and has the 90 day timebomb removed.

Enjoy

You can get the APK from here:
https://app.box.com/s/l9gt5jbd3jynitxego8rdo1oir3ew5l7
SHA256Sum: 6ce619759457f8ac56ab94f66b5e1fdeebb21f523909d70984 105dba8b6b151f