workaround to prevent caching of byte range requests in zipped content in webkit
polyfill to support Safari 6
Fix Firefox XML namespace handling incompatibilities in package document parser
by using getElementsByTagNameNS() instead of jQuery selectors that
behave differently on WebKit than on other engines.
Merge pull request #28 from pusherman/develop

Better Safari Support
Merge pull request #29 from readium/hotfix/firefox-xml-package-document-parsing

Fix Firefox XML namespace handling incompatibilities in package document parser
submodule