Added Readme

"I hope it renders right on Github", he said, recalling all the other times in the past he has said the same sentence.
Renamed "status_bar_" -> "tb_"
Fixed/Finished sorting.

I don't know if it ever worked, but now it does, with reversing, random, etc.
Fixed dropping images onto the window.

I had to WRITE (aka steal) OBJECTIVE C CODE CAUSE MAC IS DUMB GRRRRR

Anyway it works now.