Update README.md

Normalizing the README files to follow the same structure.
Update README.md

Normalizing the structure of the README file; updating with the same descriptive text as in the wiki; normalization of use of "JANUS" over "janus" (when not used as a file name).
Merge pull request #1 from hlflanagan/patch-1

Update README.md
Merge pull request #2 from hlflanagan/patch-2

Update README.md
Merge remote-tracking branch 'origin/master' into develop