mathjax iframe injection
Merge branch 'develop' into feature/mathjax

Conflicts:
	epub-modules/epub-renderer/src/readium-shared-js
Merge branch 'develop' into feature/mathjax

Conflicts:
	epub-modules/epub-renderer/src/readium-shared-js
updated dependency
feature branch
submodule update
Changes to submodule
loading mathjax on demand
call to isCurrentViewFixedLayout to chek for fixed layout view type
Merge branch 'develop' into feature/epub-module-refactoring
Elimination of SMIL parser's dependency on readium-js specific data.

The SMIL parser no longer makes use of the readium-js - specific
package document JSON data structure.
Remove unused jQuery module dependency declarations
Fix a bug with iBooks display options fetching.

The options XML document fetching has been always failing due to invalid
use of absolute file path.
Remove unused isFixedLayout method, inline the getMediaOverlay function
Removal of page progression direction info from readium-js JSON metadata
Rename the PackageDocument.getPackageData() method to getSharedJsPackageData()

The new name reflects the fact that the method should return JSON data
structure expected by readium-shared-js.
Support audio and video tags in epub-fetch

Currently, this is implemented in a naive way - by fetching media
resources into memory in their entirety as blobs.t

This has a downside of consuming lots of browser heap space.

However, if the resource is fetched from a remote ZIP file, streaming is
impossible due to absence of random access. In the future, we might
fetch media files to local filesystem using the experimental HTML5
temporary filesystem API and stream from over there.
support for rendition layout and rendition flow properties
Merge pull request #38 from readium/hotfix/ibooks-display-options

Fix a bug with iBooks display options fetching.
Merge pull request #39 from readium/hotfix/video-tag-fetching-support

Support audio and video tags in epub-fetch