Document the simple generator format

[sindresorhus]

Couldn't find a mention or example of the new simplified format anywhere.

@mklabs you mind adding some docs?

[mklabs]

Yeah, the "simple" format is not very standard, at least in the long run, I don't want it to be that way. I also didn't tested it thoroughly, so that's why it wasn't really documented, but will do.

Reference: https://github.com/yeoman/generators/blob/master/test/fixtures/custom-generator-simple/main.js

[sindresorhus]

But the format does makes it easier when all you want to do is to just scaffold a few files.

[mklabs]

Sure thing. Will do.

This is part of the top level, non generated documentation. I still need to find a few hours to do that. More a tutorial / guide thing than API documentation.

[addyosmani]

As the generator system and docs have come quite a long way since this ticket, closing. Let's address any improvements to the current docs based on specific sections that could use more work.