in progress
Preliminary implementation of Audio Player support for Desktop Browsers.
Two types of Players are introduced:
- MobileAudioPlayer was left without changes and has mobile-related tricks for initialization
- DesktopAudioPlayer uses streamlined approach for initialization
remove reflowable_view backbone dependency in progress
Merge branch 'develop' into feature/scroll_view

Conflicts:
	js/views/reflowable_view.js
removed backbone view dependency from fixed and one_page view
fixes to reflowable view
in progress
Made scrolling iframe working
scroll between docs gug fixes
Adding public API for MediaOverlay, minor fixes
Merge trunk branch
media overlay synchronization bug fix
fixedView get bookmark fix
Chage scrollable view based on settings
Merge branch 'trunk' into feature/mo_browsers
Merge branch 'develop' into feature/scroll_view
fixed position revovery between viewes
Fixed handling of SVG Content Documents.
 - _$epubHtml is loaded with <svg> element if no <html> element is found.
 - _meta_size is loaded from <svg> element's width & height attributes if necessary.
Bugfix-33 Allow elements to have a period in IDs.
Merge branch 'develop' of https://github.com/readium/readium-shared-js into develop

* 'develop' of https://github.com/readium/readium-shared-js:
  Bugfix-33 Allow elements to have a period in IDs.