Docs: Removed IRC channel links in CONTRIBUTING.md

GitHub doesn't support links with the irc protocol, so these were dead links.
Build: Upgrade to grunt-jquery-content 0.11.0
moved all examples to use 1.4.0 instead of latest
selectmenu: added missing pre tags
activePage: added warning div
replaced content divs to new style where necessary
loadPage: added content div to example
data-attribute: added warning class to deprecated elements
package.json: fixed typo in homepage URL
pagecontainer: updated jquery core to 1.10.2