OSMF SVN

Refactoring: renaming RegionSprite to RegionGateway.

Updating unit test with a check to all expected events firing properly.

removed unused imports from 10_0 builds, which was breaking the build.

Revert gateway changes, the gateway classes really do belong in a separate package as they are orthogonal to media type.

Revert gateway changes, the gateway classes really do belong in a separate package as they are orthogonal to media type.

Revert gateway changes, the gateway classes really do belong in a separate package as they are orthogonal to media type.

Adding unit test.

Fixing even listener being added to loader instead of contentLoaderInfo.

Updating ContentElement to become IDownloadable once ILoadable's load state is LOADING. Changing ContentDownloadableTrait to lift its values of ContentLoaderContext's reference to Loader, by listening to its PROGRESS events. Changing ContentLoader to construct its context on starting the load attempt, so it can be forwarded to the loadable. Updating unit tests accordingly.

Updating unit tests not to require a null context on load state LOADING.