Lots of new features and compatibility enhancements

+ Fixed issue on older browsers that didn’t support
onreadystatechange/onload events for stylesheets
+ New “waitForJSToLoad” flag for waiting until all JS files are loaded
before showing page. Default action is to wait until the last CSS file
is loaded
+ Fixed a possible small flash of unstyled content issue by setting the
visibility to hidden on the HTML element on page construction
+ Include attribute can be on any element now. It’s up to the user to
config how they want it to be