Export previewImages to XML/JSON
Only generate previewImage if previewMedia is not already an image.
Made sure previewImage gets exported.

Removed an unused option.
26.06
Fixed some cases of missing widget properties.
Merge pull request #20 from dreisch/scrubber_fixes

Fixed some cases of missing widget properties.
Applied conversion to the next verison.
Merge pull request #21 from dreisch/release26_07

Applied conversion to the next verison.
Added conversion fixes for projects < 26.07
Added ExportData class.  Use ExportData class instead of passing individual parameters for calls to "createDataExportTasks".  This is to fix a problem where the korsakow-js-player-plugin was needing new parameters for Maps, and this would create an ongoing (and with minimal changes, unnecessary) management problem when adding new capabilities that need export (like Maps).  By abstracting the data into a known class, we can avoid problems by using instances of the class for passing through the exporter.

With some cleanup.
Merge pull request #24 from dreisch/pull/19

Added ExportData class.  Use ExportData class instead of passing individ...
Fixed a bug where when saving a still a spurious entry is added to resources.
Added a tooltip to stills.
Stills get saved to an iOS folder.
Fixed not being able to break links to preview images.
Don't generate stills when saving a SNU.
Adjusted indentation
SnuHelper can do updates from existing domain objects, not just the view.
Merge pull request #22 from dreisch/convert_26_08

Added conversion fixes for projects < 26.07
Merge pull request #25 from dreisch/stills_take_2

Stills take 2