Added Lesson page; Added two column style to _page.scss; Updated TOC.
Added header-interior.html which gets rid of big message for interior pages in favor of section title; Added '.' into markup of header.html instead of adding it via :after pseudo-classes; Added placeholder icon font so we can start to test implementation; Changed layout template for lesson page to page-interior; Added some classed spans to pager markup to make it easier to work with internal pager link elements. Added partials for _detail-page-header.scss, _icons.scss, _pager.scss, _jump-links.scss with styling for all. Moved node-bottom on lesson detail page so it will clear the primary and secondary columns and span full-width.
Delete extra file.
merged in master, resolved conflicts
Merge pull request #10 from fourkitchens/lesson-components

Lesson components and some more general tweaks/fixes.