Added single (BSD) license to all the JS source files
Merge branch 'release/0.14' into develop
Updated dependency
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.
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.
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