Add --help option

[jonaf]

We need --help! Our documentation doesn't do a good job of providing usage info, and in general, we should be able to add --help to a command and get some usage instructions. This should alleviate some of the confusion / issues we have seen, such as #67 .

[ozbillwang]

Thanks, @jonaf

[bkruger99]

92

Hopefully this alleviates some of it. Though should note, that it doesn't do --help, it's just one of the actions for your json->ruby template arguments which takes a snippet of the updated README.md file I provided as well. There's probably a better way to generate it to only maintain in one place, but for now it should help keep people from having to dig too deeply to figure out commands, syntax, etc.

[temujin9]

Closed via #92