Checking in changes to support DTCP for MPEG program streams.
Added ability to index 'vobu' (video object unit) boundaries
in the index files. Tested with few program strems.
More testing in progress.
Fixed an issue with normal play index file generation and
clean up. Testing still in-progress..
Resolved issue with index file generation when dvd-derived program
streams are used. In this case the logic that searches for Sys header
and SEQ header is slightly modified. Some clean up in reverse
trick stream generation logic.
Merge pull request #2 from cablelabs/dtcp-mpeg-ps

Dtcp mpeg ps