Update footer to match main site
Add Gemfile

Gem list taken from https://help.github.com/articles/using-jekyll-with-pages
Don't downcase API navigation anchors
Remove duplicate key
Generate v1.0.1 API post

Couple problems here:

* The generated YAML front matter was invalid (parentheses).
  Manually cleaned up.
* `version: v1.0.1` triggers the "Try MapBox.js v1.0.0" blurb.
Remove "Try v1.0.0" notice

It's conditional is wrong, and there's already a "Viewing
an older version" notice on the page.
Fix v1 examples links
Delete generated v1.0.x API pages

These are generating correctly for me locally with the
same gem versions and command line as used by GitHub pages.