update example sources

fixes #46
explain :path a little more
Use https in Gemfile example
Merge pull request #47 from lenniboy/patch-1

Use https in Gemfile example
Double quote in rack version broke highlighting.
Adding require => false note to Gemfile section.
Merge branch 'require_false' of https://github.com/simi/bundler-site into simi-require_false
globalsign site verification
add globalsign (ssl cert) to sponsors
update middleman to (hopefully) fix C-c error
Change CNAME to bundler.io.
Merge pull request #50 from TimMoore/update-cname-to-bundler-io

Change CNAME to bundler.io.
update analytics for new domain
Fix broken links to CONTRIBUTING.md
Merge pull request #55 from yaotti/fix/broken-links-to-contributing

Fix broken links to CONTRIBUTING.md
renamed to DEVELOPMENT
skeleton right sidebar
made container width smaller, for better spacing/look
added links and similar styling
single quotes wins