fix content being pushed down by the table of contents, and a lack of lower margin on sub headings
compile scss changes
the main ul in the toc has padding, dont pass on the right in child lists
Merge pull request #27 from Tarendai/toc_headings

Topics box UI improvements:

* Fix the wrapping of text around the Topics box (prevent main body text from starting below the box)
* Fix Topics right padding for embedded lists
* Add some margin-bottom to headings