OSMF SVN

PARB changes:

Removing MediaContainerGroup. Exposing the inner layout renderer publicly in order to facilitate container nesting. Updating NestedMediaContainers sample accordingly.

Overriding display list management functions on MediaContainer to throw an exception on direct invocation. As a result, layout renderers are no longer capable of adding display objects onto a container, but this is resolved by LayoutRendererBase now emitting events requesting display object (un)staging or index adjustment. LayoutTargetSprite and MediaElementLayoutContainer have been updated accordingly.

PARB changes: LayoutRendererProperties, remove "ment" from horizontal- and verticalAligment. Set MIDDLE constant to "middle". Updating unit tests and client code accordingly.

PARB changes: Rename TemporalProxyElement to DurationElement.

PARB changes: Move all MediaElement subclasses into the "elements" package. Put internal classes into non-public subfolders (e.g. audioClasses). Update unit tests and sample apps. Remove VAST unit tests from OSMFTest, we should integrate VASTTest into the build system.

PARB changes: splitting layout alignment property into verticalAlign, and horizontalAlign. Removing registrationPoint property, and its enumeration class. Adding VerticalAlign, and HorizontalAlign enumeration classes, and updating unit tests and client code accordingly.

PARB feedback: rename LayoutProperties to LayoutRendererProperties.

Pre-PARB'ing the Layout API continued:

- Internalizing layout facet classes, and
- Adding a public LayoutProperties class,
- Removing LayoutUtils (for setting properties can now be done using LayoutProperties),
- Introducing IMetadataProvider, and marking classes that have a metadata getter to be implementing it,
- Remove LayoutRendererFacet (for it can be fetched/set directly from/to the metadata easily using ObjectFacet),
- Adding LayoutRendererMode, in preparation for horizontal and vertical boxing support on the default renderer,
- Updating client code and unit tests accordingly.

Updating OMSF player to:

- Use the framework layout system to position the control bar,
- as well as for positioning the right-click overlay.

PARB feedback: Allow MediaElement subclass constructors to have default params. This involved moving the ILoader param to the second param, and providing a default when no loader is provided. For subclasses (like VideoElement) for which multiple loader types are supported, the implementation now chooses the appropriate one based on the resource type.

Updating MediaContainer-, NestedMediaContainer- and ExamplePlayer samples to work with the layout changes.

PARB changes: commenting "validateNow" with @private, and renaming containsGroup to containsChildGroup.