Sitewide methods you write
These methods are called on every content item, regardless of what plugins are placed there. You can use them to write HTML that appears sitewide.
addToSitewidePageHead()
This method lets you write HTML to the <head> tag of every content item on the site.
addToSitewidePageBody()
This method lets you write HTML immediately after the <body> tag of every content item on the site.
addToSitewidePageFoot()
This method lets you write HTML immediately before the </body> tag of every content item on the site.
