add hangman (coppied from https://github.com/slice/lifesaver/blob/21f663be8416c64f42ff4115d14e04f8603de497/sample/exts/hangman.py)
add hangman (coppied from https://github.com/slice/lifesaver/blob/21f663be8416c64f42ff4115d14e04f8603de497/sample/exts/hangman.py)

mralext20/alex-bot