Present documentation of types.
Test for type documentation

Also, a few extra lines in the types_and_specs fixture to avoid generating a
warning upon compile.
Use docs[...] instead of ListDict.get(docs, ...)
Adapt typedoc tests to paren ommission on types
Use a table with descrs for summaries

This makes it easier to get an overview of a module.

The description is pulled from the first element.
Add module summary page.
Merge pull request #70 from pminten/docs-for-types

Present documentation of types
Merge pull request #74 from pminten/function-and-module-summaries

Function and module summaries
Depend on 0.10.3-dev
Do not add undocumented records to docs