Release notes:
 * New features
  * Browser frames
  * Audio frames
  * Video frames
  * Comment frames
  * Basic timelines
  * Basic text styling (see known issues)
  * Text chaining
  * Text search
 * Improvements
  * Page preview palette is now more usable
  * Full screen is now more usable
  * Zoom panel is now more usable
  * Rotation is now done by dragging the rotation halo

Known issues:
 * Preview performance is low in some cases
 * Some media formats may cause issues when previewed
 * Text styles are not saved
 * Resizing frames by dragging borders crashes the application
 * Page resize halos may work incorrectly
 * Playing more than one media stream may break the application
 * Comment frames could not be saved