Move a test to RoundTrip

RoundTrip supports examining expected output. We don't
need to create a separate test for this purpose.
Merge pull request #127 from chenyang78/parser_test

Move a test to RoundTrip
version bump
some inference tests
Merge pull request #126 from regehr/infer-tests

testcases for inference
Merge pull request #129 from regehr/bump-llvm

version bump