OSMF SVN

Update import statements to match new package structure.

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.

Match the FMS behavior where seek-after-end is supported.

Adding inline documentation to the control bar plug-in sample.

Updating sample to have its root-element use an absolute width and height. This ensures that the control bar shows in the right position, regardless of the video content being available yet.

Tweaking sample to have the parallel element use a fixed size.

Removing debugging statements, and extending comments.

Adding copyright header.

Adding a simple layout sample that demonstrates how to position an overlay bug over a video using a parallel element.

Adding a 'smoothing' property, parallel to the one we have on VideoElement.