(developers) overview of some easy new module development features

You may notice a couple of things in module code now.

It was hard previously to embed examples in the DOCUMENTATION
docstring (which is YAML formatted). Rather than trying to do the
old "examples" inline, you can now also do EXAMPLES as a free
formatted text docstring. This is going to be the favored way to do
it for new modules, but the old way still works. Thanks to Jan-Piet
Mens once again for some great docs additions.

Finally, thanks to Daniel Hokka Zakrisson for adding some cool type
checking features. You will see this in various module argument
specifications, and you can do strings, lists, and so on. It will
cast things for you so have to write even less code to convert types
of arguments. Good stuff!