ignore new built directory for docs
0 may be falsy in JavaScript, but it's a perfectly fine number.
Fixes #283
Merge branch 'master' of https://github.com/brownplt/pyret-lang
Merge branch 'master' of github.com:brownplt/pyret-lang
bootstrapped with s-exp fix
regression for error rendering
export predicates for s-exp forms and test them
reverse error order and clean up tests that depended on old order
Merge remote-tracking branch 'origin/master' into type-check