Adding expose, removing unnecessary vars, renaming append to merge
Merge pull request #11 from buzzdecafe/master

simplifying contains & find; keys & values; license
Merge pull request #12 from buzzdecafe/master

include omitted test file
Adding tests for core functions
Merge branch 'master' of https://github.com/CrossEye/eweda
Removing native dependency for `keys`, renaming `expose` to `inContext`.
dedupe example & comparison with iterative style