Gets an object with all CSS positioning properties. Useful along with
#setPostioning to get snapshot before performing an update and then restoring
the element.
@param {Boolean} [autoPx=false] true to return pixel values for "auto" styles.
@return {Object}
function(autoPx){
            var styles = this.getStyle(['left', 'top', 'position', 'z-index']),
                dom = this.dom;

            if(autoPx) {
                if(styles.left === 'auto') {
                    styles.left = dom.offsetLeft + 'px';
                }
                if(styles.top === 'auto') {
                    styles.top = dom.offsetTop + 'px';
                }
            }

            return styles;
        }