Multiple lines in sections (including "returns")

[vindex10]

This pull request provides the following feature.

SomeSection:
    Description
        >>> Also with code
        >>> In multiple lines
        and output
    And now you can continue text of section

The same thing is now possible in "Returns" section, which provides an ability to give an examples of return values. It is important for consistency with Google Python Style Guide:
https://google.github.io/styleguide/pyguide.html#Comments

[Feneric]

Similar to the earlier one, I think this is a useful addition but we'll need to add a test case for it.