Fixes from Issue #167

This fix some issues mentioned in here https://github.com/h5bp/Effeckt.css/issues/167.

Now positional modal and modal 3d effect works and some modals improvement.

After a couple of days trying to figure out how to make page transition better, it all ends on a better page structure, I test different structures but when page transition works smoothly others elements failed. I understand it needs more job on others element to adapt each other.

So I disabled page transition until I manage to make it work as I think it's better or until anyone could make it right.