Added description of new features
Added description of new features

<meta> and <link> autoupdate
X-PJAX-Location header
X-PJAX-Vars header
duzun/jquery-pjax,braunrb/jquery-pjax,duzun/jquery-pjax,braunrb/jquery-pjax,duzun/jquery-pjax,braunrb/jquery-pjax,duzun/jquery-pjax