support altering quality without specifying format
refactor tests

- Make many tests more unity, directly calling the methods they are designed to test and testing for specific return values and side effects and group them together
- Make tests pass for dprs other than 1
add fresh built files
fix up a couple more tests
Merge pull request #247 from mobify/v2.0-quality-without-format

support altering quality without specifying format
Run Utils tests on Saucelabs
Merge master, set resize default to true, fix tests