Update specification to match state of bikeshed at head:
 * convert 'attribute' type to 'dict-member' for members of IDL
   dictionaries.
 * Remove start-of-line '+' as markdown now thinks this is a list.

Generated from:

commit ff7fef772623a62ab83244c67247b711ccbfb665
Merge: 20a3278 84757ff
Author: Brian Birtles <birtles@gmail.com>
Date:   Wed Oct 15 12:13:02 2014 +0900

    Merge pull request #37 from shans/idlSummary

    Add IDL summary.

commit 84757ff98e857cb8b7d5229f20ec03ae2bb5ef29
Author: Shane Stephens <shans@chromium.org>
Date:   Tue Oct 14 13:53:00 2014 +1100

    Add IDL summary.