Added ability to generate DOM Ids unique to parent
Fixing tests affected by the change.
Merge pull request #135 from makyo/unique-ids

This allows relations (which are identified as 'source:endpoint1 target:endpoint2') to have unique DOM ids between bundle visualizations and the environment canvas.
Mocking out Y.one breaks Y.Node.create() because it uses it under the hood. This removes the mock in the test that was causing the failures in IE
Merge pull request #138 from hatched/sethtml-ie-failure

Mocking out Y.one breaks Y.Node.create() because it uses it under the hood. This removes the mock in the test that was causing the failures in IE