Separate string primitives
Further separation of primitives
Rewrite primitiveBindings definition
Guessing game update and number->string primitive
Format updates in Eval.hs
Refactoring of hangman code
Inline length, foldr, and foldl for speed.
Replace char-list with string->list, and add list->string.
Add stdlib definitions for random, lines, and words.
Move string->list out of game
Add NUM_TRIES
Monad updates for List