#30: - parallax effect
Merge pull request #31 from lazd/gh-pages

 #30: - parallax effect
use protocol-relative URL to load libraries

browser will tell users that the page contains some insecure resources, use protocol-relative URL can prevent this issue.

reference : [The Protocol-relative URL](http://www.paulirish.com/2010/the-protocol-relative-url/)
Merge pull request #55 from PeterDaveHello/patch-1

use protocol-relative URL to load libraries
Merge branch 'gh-pages'
v0.4.0: Saving and restoring of the sort (#54)
* upd
* upd
* JSDoc
* revert #49
+ dev (v0.4.0)
Fixed typo
Merge pull request #63 from dminkovsky/next-element-sibling

Fixed typo
* 245
Merge branch 'master' into dev
* v0.4.1
* jsdoc
Fixes for #66: Clicking handle makes other non-handle elements draggable
Merge branch 'master' into gh-pages