[dpub a11y] pacakaded documents section

I've added a section about the accessibility of multiple documents in a package: https://github.com/w3c/dpub-accessibility/commit/3e1cddfceffc080283df26f14bbe5cfd8184af09

Please feel free to edit.

Tzviya Siegman
Digital Book Standards & Capabilities Lead
Wiley
201-748-6884
tsiegman@wiley.com<mailto:tsiegman@wiley.com>

Received on Thursday, 21 January 2016 19:04:00 UTC