refs #2465

 * support for internet explorer 7 & 8
  * redirect by setting window.location.href loses referrer - use fake link
  * implementing position:fixed for status bar in java script
  * when visibility=inherit, go up the dom to find out whether an element is visible
  * avoid .data() completely in followingpages.js
  * some specific html and css
 * adding v parameter to loaded script to invalidate caches
 * regenerating piwik.js (i hope it worked properly this time)
 * hiding notifications that get stuck after removing a hovered element (only happens sometimes)
 * binding window.resize after every broadcast.pageload() - the binding was lost after opening a popover
 * fixing mode with frames disabled: didn't work after migration to the l parameter

This version is the first one that I think is stable. Please deploy on the demo so we can do some more testing.

The next step is translation and documentation. After that, we're ready to release as beta.

git-svn-id: http://dev.piwik.org/svn/trunk@7479 59fd770c-687e-43c8-a1e3-f5a4ff64c105