moved README and updated vagrantfile
Several tasks

- [X] Validator for assignments
- [X] Rearrange tests in website to conform to tool's directory layout
      - [X] Separate directory for sanity and grading tests
- [X] Create settings.yaml and tweak sanity tests to conform to
      tool's YAML format
Corrections to setup script.
Container for testing/grading
Fixed test cases.
Improved testing library

- Use implicits to enable/disable tests
- In cmpsci220._
colored test output
removed old test framework
simple List