Update to PHPUnit 4.3.5

- Adds isInIsolation() method
- Adds expectedExceptionMessageRegExp annotation
Add a changelog
Bump version to 0.2.0
Merge branch 'release/0.2.0'

* release/0.2.0:
  Bump version to 0.2.0
  Add a changelog
  Update to PHPUnit 4.3.5