Improve documentation

[planetguy32]

It seems like I haven't done a good job communicating the features in the mod. Screenshots and maybe GIFs of each thing in action would be useful.

Once that's done, a video spotlight would be helpful to show off the mod at a glance.

To take nice pictures of items, I've had good luck with http://forums.technicpack.net/topic/42304-15x1621710-item-renderer/