Vertical layout for program
Add program detail to yaml
Remove gravatar icon and triangle

- If the gravatar is not available, this will show a broken image icon
  which messes the look.
Use gray and brand red as a colorscheme
Add descriptions and speaker emails
Add some margin; center-align title
Add workshop schedule
Link schedule in nav
Fix mistakes in schedule
Merge pull request #34 from GardenCityRuby/program-layout

Add program layout