3DCSSSprites no longer block events from propagating to the scene controls, making zooming a much smoother experience.

Partially related to #8.

Fixed a bug in the gulpfile which caused the dataset default images to not be included in the build step.

Bump some package versions.

updated gulpfile.js to include the default images for image alpha transparancy and graph image defaults.

This also partially fixes a bug which caused the admin-view of the graph to not render correctly.