implemented and documented print_hands/generate_card_pictures

print_hands
![image](https://cloud.githubusercontent.com/assets/8142499/3650158/a21df27e-1119-11e4-968c-ad8e6063d215.png)

generate_card_pictures
![image](https://cloud.githubusercontent.com/assets/8142499/3650163/bc00b69a-1119-11e4-8a44-51bf076254f9.png)