Sidenav doesn't respect opened property

[DzmitryShylovich]

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https://github.com/angular/material2/blob/master/CONTRIBUTING.md#question.
This repository's issues are reserved for feature requests and bug reports.

• Do you want to request a feature or report a bug?
  bug
• What is the current behavior?
  Sidenav is always opened when opened property is specified even if opened="false".
• If the current behavior is a bug,
  please provide steps to reproduce and if possible a minimal demo of the problem
  http://plnkr.co/edit/fwXhGYTCLxDjM6qMxXDf?p=preview
• What is the expected behavior?
  Sidevan should be closed when opened="false"

[jelbourn]

I believe @devversion fixed this in #444

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