OSMF SVN

Add sample VAST app that integrates VAST ads as prerolls or postrolls.

Enabling serial switchable test.

Added ASDocs to MAST object model code.

Add ASDoc comment.

Some fixes to ASDocs.

Merge Impression and TrackingEvent support into MediaElement generation.

Rename VASTAdInline to VASTInlineAd. Fix cardinality of VASTVideo (one, not N).

Fix bug where next child of SerialElement doesn't play if the previous child's triggered a NetStream.Play.Stop (indicating completion), but its position is less than the duration (perhaps due to improper encoding/keyframes).

Make VASTParser stateless.

Fix typo.