Latest release in master-branch

[linus.gass...@gtempaccount.com]

Hi all,

We’re working hard for bringing services to SDA, and we’re nearly there. But before we break everything by merging the services into development, we saved development by merging it into master. The list of improvement is long, but to say the least:

• lots of bug fixes, comments and documentation
  
• added a new JVSS-protocol that is much easier to use
  
• BFT (Byzantine Fault Tolerance) got separated from Byzcoin