what does it (not) mean to get a (fathom-) credential?

addresses post 1 of #50 (closed)

this MR holds several files

everything that is ends with -.org is my notes, which should help understand where this series will be going.

the post that is to be published is the file named: blog/2018-07-15-what-does-it-(not)-mean-to-have-a-credential.md