Use https for link to eve-overview.
Update highlightjs to 8.3.0.
Update normalize-css to 3.0.2.
Update foundation to 5.4.7.
Check-in Gemfile.lock.
Use https for link to demo site.
Fix link to humans.txt.
Use https in _config.yml.
Ruby to 2.1.4 in .travis.yml.
Add caching for Travis; exclude vendor.
Use install over update for rake ghpages.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	README.md
	_config.yml
Update io.evansosenko.com links to use https.
Use https in example for apex post.