0.2.3

• Update uuid dependency to latest version.

0.2.2

• Avoid rendering empty anchors within nav element.

0.2.1

• Update dependencies (chrono, uuid, error-chain) to latest versions.

0.2.0

Fix the way mimetype is stored in the EPUB file (insure it isn't deflated).

This caused some minor breaking changes:

• The Zip implementations now take care of adding the mimetype file, not
  EpubBuilder.
• ZipLibrary::new() now returns a Result<ZipLibrary>.

Normally, replacing ZipLibrary::new() with e.g. ZipLibrary::new()? should be
enough to switch to this new version.

0.1.2

• Fix the cover image properties in EPUB3.
• Some code cleaning.

0.1.1

• Add add_cover_image method to EpubBuilder.
• Add ReferenceType enum and reftype method to EpubContent to add items to
  the guide section (EPUB2) or the landmarks section of nav.xhtml (EPUB3).

0.1.0

• initial release