Fix selector typo: component.root -> component-root
Merge pull request #21 from flightjs/fix/test-typo

Fix selector typo: component.root -> component-root
Fix setupComponent unnecessarily wrapping fixture in div

Fixes issue where component is not created on root of the fixture.

- Add 'component-root' class to test fixture
- Remove unit test dependency on html generation (which can be
  nondeterministic)