Converted https://devel.rtems.org/wiki/Developer/Git/Committers
to Rest, and TBDs and wiki TODOs into comments. Also changed http
links to https (the ones that are possible), corrected some typos,
created a folder for eng images and added some formatting.
This work was part of GCI 2018.
All of the redrawings were made by me except images/c_user/states which
was made by LukaMag. This patch serves to update all the images.
This work was part of GCI 2018.
Fixed tables, typos, redrawn images and converted ASCII art to ditaa
and PNG, and improved the overall format.
This work was part of GCI 2018.
Closes#3567.
