Issue #78 : add some tests for evaluator
Issue #78 : add more tests
Issue #78 : add parsekit project
Issue #78 : further project configuration for ParseKit
Issue #78 : use ParseKit to tokenize expression, enable list to support != and ==, all test cases pass
Issue #78 : add more tests
Issue #78 : add ParseKit version informaiton inside readme
Merge pull request #160 from google/issue78

Issue78
merge ios-init