Print out player hand before each choice.

It bugged me that I couldn't see my hand before each turn. So I made it do that.

Two other minor changes:
- Print a blank line after a game ends. I had a hard time realizing a game was over, since another one starts up right away.
- Use raw_input instead of input. Safer, and can't cause a syntax error. Let me know if I am missing some good reason to use input.
Jaime's idea is clever, I will give it that. I kind of don't like some of the output of that (Mun instead of Mus, Amr instead of Amb, etc.

I had it all in it's own function at first, but then I thought "Isn't the abbreviation a property of the card? Shouldn't all the info about a card be in the Card class?". It could very well be that the answer is no! :) I'll move it back to the function.