Made minor residual edits for CDS

[panissidi]

@samdutton

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[samdutton]

LGTM — merging.

[panissidi]

@samdutton

Only two things left to resolve in this article:

1. The title should be Capture audio and video in HTML5
2. In this line toward the end, the links for "access USB" and "interact with Bluetooth" don't work.