fixed jQuery selector issue (escape special characters), was affecting Media Overlays playback (not sure about other functionality)
- fixed jQuery selector escaping + fixed iframe loader timeout
added missing objects to public API of EpubCfi (exceptions / errors)
now Media Overlays playback engine captures the document-load-start event in order to pause its internal state whilst the iframe is loading, and performing its layout.
fixed edge-case: multiple XHTML per single SMIL (100% pass epub-testsuite, AFAICT)
clean-up Media Overlays highlighter API + stub code for multiple sync granularities
Media Overlays multiple sync granularity
minor fix: reverse nested synchronisation scope scan
epub:type space-separated values
minor MO highlight fix for sub styling (nested synchronisation granularity)
call to MO before openBook will fail!
MO sync UI features
fixed MO sync scanning
null parameter check
Merge branch 'develop' into txtr_dev