Minor Anchor Tweak - Scrolling Fix

For some reason, my version of Anchor completely bugs out when you start increasing the size of the text input beyond a certain point. This was making it really hard to write longer articles, so I tracked down the fix.

In '/anchor/views/assets/js/text-resize.js', the resize function code needs to be changed to:

function resize(e) {
    var scrollPos = document.scrollingElement.scrollTop;
    $text.height($text.prop('scrollHeight') + 'px');
    document.scrollingElement.scrollTop = scrollPos;

The previous code was using a scrollTop() function that didn't work on a body with a height of 100%.