fixes #2922 replaced jquery.history plugin with an newer version. tested history function in IE 7-9, Chrome, Safari (Win), Opera, Firefox - works so far :) 
@matt would you please test that, too. Didn't have much time for that right now.

git-svn-id: http://dev.piwik.org/svn/trunk@5832 59fd770c-687e-43c8-a1e3-f5a4ff64c105