ACTION-9: Events related to tts and pagination

notes for Brady and Gerardos action items:
Functional Requirements re dynamic pagination: events and DOM
Events:
- book load
- page load
- page change (e.g. reflow after font size change)
- what page loaded
- when a page is loaded
- when a font is loaded (cf CSS3 Fonts Loaded Events Module 3)
- TTS reaches end of page, event to auto-trigger page turn
(note two scenarios: external AT vs self-voicing)
DOM
Whats a page, how to I reference it
I get an event that a page is loaded, how do I get to that page
API
turn a page
go to a page