Load and verify given github user / organization

[biern]

Since gists won't work for organizations, I suppose we can just use a hardcoded repository name and proof filename. Eg: https://raw.githubusercontent.com//signhash-proof/master/proof.txt @jstefanski any remarks here? Subtask of #31

[jksf]

Good idea. Public GitHub repositories are free so that anyone can create one. I am not sure if it is not too much hustle (create the repository, clone it locally, add the file, push it), but I cannot think of anything better.

[biern]

Actually, you can just click through the whole process. First, create a repo on github, then click create new file and paste the proof declaration template, filling the signer address.

[jksf]

Ok, that's much better :+1: