Corrections for 2014 WWDC transcripts

First of all, I normalized the line endings (they were mixed CR+LF and LF).
Then I started to remove the duplicate subtitles, but I haven't thought of a semi-automated way to do it, so i kept find 3 consecutive LF, and manually delete the preceding duplicate. It took me 10-15 minutes to do one video. If there's a way via Regex, it would be more convenient.