Moved functions for manipulating types into a new file and revised int(), true and false.
Changed definitions of true and false to avoid root.lookup
Merge branch 'master' of https://github.com/emgroup/js-eden
Merge pull request #25 from ElizabethHudnott/Improve-type-casting,-type-testing,-etc

Moved functions for manipulating types into a new file and revised int()...