Update README.md

Fix: `Permission denied (publickey)`
Merge pull request #113 from rainsun/patch-1

Update README.md
Add Markdown documentation
Update D3.js documentation (3.4.11)
Update Ember.js documentation (1.6.1)
Update Git documentation (2.0.3)
Enable sidebar keyboard navigation on desktop touch computers

Fixes #112
Change alt+rarr shortcut to alt+f

Avoid conflict with OS X text input keyboard navigation
prevent stringio error from opening small files
Merge pull request #114 from nitay/open-read-small-error

Prevent stringio error from opening small files
Require open-uri in DocsCLI#download_docs
Rescue all exceptions when downloading docs
Update Node.js documentation (0.10.30)
Log current url when container isn't found
Add Django documentation
Copy changes
On Windows, use alt modifier instead of ctrl for back/forward navigation

Fixes #51.
Refactor Mac/Windows detection
Update Express.js documentation (4.8.1)
Update Moment.js documentation (2.8.1)