VobSubFile: Fixed creation of a custom palette with Matroska

Fixes rendering of vobsubs in Matroska when the custom colors
feature was enabled.

Backport of MPC-BE commit 1995
Run astyle with the mpc-hc configuration on the code base
Vobsub: Avoid parsing the complete subtitle entry when possible

Backport of MPC-HC commit 96754dc
Vobsub: Support animated subtitles (with fade in/out)

Backport of MPC-HC commit ec3fd94a