Remove old-modernizer file
Run JSHint on test files and fix issues

- Added seperate JSHint target so options for tests don't interfere with
those chosen for the source files
- Added watch task so tests are validated and qunit is run when they're
modified
- Purposly excluded r.js and the testing libs
Merge pull request #862 from nschonni/files-cleanup

 Run JSHint on test files and fix issues