Merge remote-tracking branch 'remotes/origin/patch-3'

Merged Branch 3.
Merge remote-tracking branch 'remotes/origin/patch-4'

Merged Branch 4.
Merge branch 'master' of https://github.com/BobMcFry/codegolf
Merged.
Added Prolog version of Arab to Roman converter.
Adjusted README.
Merge pull request #20 from BobMcFry/master

Prolog Version of roman_numeral