submodul
support for rendition:viewport https://github.com/readium/readium-shared-js/issues/86 see also https://github.com/readium/readium-shared-js/issues/84
Update submodule
Merge branch 'develop' of github.com:readium/readium-js into develop
submodule
submodule
fixes #67
Merge remote-tracking branch 'origin/develop' into feature/textWidthMargins

Conflicts:
	epub-modules/epub-renderer/src/readium-shared-js