OSMF SVN

first checkin of http streaming live support

Hide some APIs. Add copyright header.

Integrate ExamplePlayer with latest API changes.

Update import statements.

PARB changes: Hide HTTPLoader. Hide Beacon, make BeaconElement work with a URL instead of HTTPLoader.

PARB changes: Make TimeUtil non-public, it doesn't need to be part of the public API.

PARB changes: Move DateUtil to f4mClasses, it doesn't need to be part of the public API.

PARB changes: Move BinarySearch to layout package, it doesn't need to be part of the public API.

PARB changes: Move Base64Decoder to f4mClasses, it shouldn't be part of the public API.

PARB changes: Remove unload and query methods from PluginManager. We lack compelling use cases for those methods, but can easily re-add them later if we come across some.