Highlight 100 registered events!
Fixes typos in hosting guide
Updates hosts guide with training links
Adds DNSimple as a continent sponsor
Adds GitHub as a Globe Sponsor!
Merge remote-tracking branch 'origin/before-map-change'

* origin/before-map-change:
  Adds GitHub as a Globe Sponsor!
  Adds DNSimple as a continent sponsor
  Updates hosts guide with training links
  Fixes typos in hosting guide
  Highlight 100 registered events!

Conflicts:
	public/index.html
Fixes typo on sponsors page
Merge remote-tracking branch 'origin/before-map-change'

* origin/before-map-change:
  Fixes typo on sponsors page
Use Sinatra to serve pages

Sinatra will allow us to be more flexible going forward, using tools
like ERB templating and SASS stylesheets (http://sass-lang.com/)

This commit doesn't change the content of the site at all.