OSMF SVN

Add dynamic buffering example to ExamplePlayer.

Updating prototype with latest tweaks resulting from writing the specification.

Add VAST media file resolver. Centralize supported video MIME types into a framework constants class.

Add support for merging inline and wrapper ads. Currently limited to impressions and tracking events, we'll need to merge companion ads and nonlinear ads once we support them in the playback layer.

Add more unit tests for VAST validation.

Add support for strict validation of VAST documents during parsing.

Add parser support for the Video tag. Add unit test for an empty document.

Convert inline strings into constants.

Add enumeration class for VAST resource type attribute.

Add support and unit tests for parsing VAST documents (inline or wrapper). All elements are covered with the exception of Video.