dart-lang/spark — pull request #1370 by umop (2014-03-18 23:09:19+00:00)
Title: Styling for outline

- Embedded class children ul into class' li.
- Moved toggle button to bottom right and moved css to spark_polymer.css.
- Added margin above and below classes for clarity
- Added (possible) left line to show class indentation
- Uniform margins all around outline

Review @dinhviethoa