Simple python test-runner

 This simple test-runner is
 * Simple to use (zero configuration).
 * Can output a text report of test passes/failures.
 * Can output a junitxml report of test passes/failures.
 * Compatible with testtools and test scenarios
 * Can run tests with coverage, and save coverage to:
  - Cobertura-compatible XML.
  - Human-viewable HTML.
  - Human viewable Text.