1.04 will support Digest-Md5 and Facebook

I have added Digest-Md5 support to Monal and it will be in 1.04 .  I added this because it is what Facebook uses.  I will have a Facebook preset in Monal with all of the server settings in 1.04. Hopefully facebook will fix the lack of SSL by then as well.  It also looks like I need to support aliases. Facebook chat is unusable and  confusing  without it.