fix issue with spaces being replaced in help script
Merge pull request #582 from vanetix/master

fix help script spacing
Add 'authors' documentation section

There are several scripts that have `Authors:` block with two or more people instead of `Author:`,
and when these scripts are included, `hubot help` prints author names as commands.
Merge pull request #583 from spajus/help_commands_fix

Add 'authors' documentation section