Feature Release

Changelog:

New Features:

• Added support for <sup> and <sub> tags in annotations
• Added support for animating light position
• Hawaiian language UI option
• Added prompt to encourage user to interact with the scene
  • Enabled by default, can be disabled by setting the 'prompt' attribute of the Explorer component to false.
  • Disappears when user interacts
  • Disabled if navigation is also disabled

Bug fixes:

• Fixed odd drag/drop behavior (#200)
• Changed pointer to 'grab' when over interactive 3D window
• Fix for language changing race condition (#211 @sdumetz)
• Fix for inability to delete the last tour in a scene