* Fix var precedence check to support python 3.
* Run CI sanity tests using python 3.5.
* Disable pylint non-iterator-returned test to pass on python 3.5.
* Refactor sanity classes for use in all tests.
* Use lint/junit output for compile test.
* Add missing options for compile test.
* Fix early bailout on requirements install.
- Tests are run to completion instead of stopping on first failure.
- Test results are now parsed instead of passing through to the console.
- Test results can be saved in junit xml format.
- Test results will show up on the Shippable "Tests" result tab.
- Added an experimental --lint option for easier integration with other tools.
- Code smell tests are now usable with the --list-tests, --test and --skip-test options.
- Code split out from executor.py into sanity.py.
- Rename download-logs to download.py and add support for test and coverage results.
- Miscellaneous improvements.
