* Editor
  * Get MathJax running
* Figure out why Dialogs won't fire in IE7 (likely a css issue)
  

HIERARCHY
  _Footer.md
  _Sidebar.md
  Page1.md
  projects/
    Page2.md (uses root sidebar)
    _Footer.md
  experiments/
    _Sidebar.md
    Page3.md (uses footer.md)

Images work the same way.  You can keep similar pages in a directory with their own images.