Merge pull request #22 from j-b-m/master

Fix kdenlivetitle typewriter effect
Fix build against FFmepg 0.5 and 0.6.
Fix A/V sync when splitting audio and video (kdenlive-2694).
Continue A/V sync fix when splitting audio and video (kdenlive-2694).

Previous version only applied to the audio stream when in > 0.
Fix interlace flags in rawvideo output.
Fix audio seeking when no first video pts available.
Add release notes for v0.8.8.
Set version to 0.8.8.
Update ChangeLog for v0.8.8.
Convert dynamictext to use pango and composite directly rather than
wrapping watermark.
Improve field order indication on rawvideo output.

Based on patch by Steven Boswell II.
Fix YAML parser not tracking sequence index per tree level.

Also, switch to using the back of the deque, which is more efficient.
Fix wrong type causing bug in titler (kdenlive-2971)