1.3.0

• Support videos with rotation [#210].
• Generate missing thumbnails from the resized image if possible [#211].
• Fix background-image url in the PhotoSwipe theme [#213].
• Implement a first version of video support for the PhotoSwipe theme [#216].
• Update Google Analytics UA Code [#221].
• Use leaflet-providers.js to allow chosing the tile provider for the map in
  the Galleria theme [#218].
• Fix theme.url path in the media page plugin for the Colorbox theme. [#224]
• Add 3gp to the list of supported video formats. [#226]