Add HTML to modules folder and parse module html

This adds better docs to the static page builder and
therefore targets (#118).

It’s part of #123 (v2.0) though and closes #129 when
merged.

Please have a look at it, @drublic. Thanks! :)
I wonder if we do really need to alter the name of the file. I am in favor of using the JSON object's name for it so we can drop this line from the file and do it automatically. I think the `temp` can confuse people. What do you think?