improve terminal-based UX

[sbellem]

We are making this a terminal-based game, and it would be nice to improve the user experience.

Add your ideas here or in the comments!

Here are some things that can be improved:

Improve the way ships are initialized (use the battleship_board.py code)

• enter the ships using the (orientation, x, y) approach
• print the ships/board to stdout

Improve feedback to user

• provide feedback to help the player keeping track of the hits they have tried
• inform the user if a ship was sunk (?)

Improve look and feel

• Use ascii art (not sure what to use for python, see https://stackoverflow.com/questions/9632995/how-to-easily-print-ascii-art-text for instance, or just search python ascii art)