Added start to execution engine docs.
Updates to documentation, fixed version numbers in docs.
Merge pull request #1 from lossyrob/updates/0.9

Updates/0.9
Make fonts and colors in doc consistent with fonts on homepage
More making fonts and spacing consistent
Remove divider spans because this style is already being performed by a css pseudo element and two slashes were being created (one was white, so it was hard to see)
The .active class was conflicting with bootstrap's style for active menu items
Add padding to navigation menus, blow away some caret styling
Need to add this path for sphinx on my mac