ASS/SSA: Add support for color and alignment overrides

Fixes #1702
freetype: Add some disabled code that might be useful in the future
rpi: Fix various build problems
Correct subtitle cordinates if subs displays outside of visible screen

Fixes #1051
Allow user to adjust position of subtitles from video playback menues

Fixes #1053
ps3: Make it possible to configure seeking using L2/R2

It can be configured in three modes

Yes
Yes but only in combination with Select
No

Setting found in Settings -> Look and feel

Fixes #1691