SCUMM: Use correct sound type for digital sfx.

This makes sure that digital sfx in pre digital iMuse games are using the SFX
sound type rather than the speech sound type. This allows proper volume
control.
SCUMM: Make sure digital SFX are played even when speech is muted.

This makes sure that digital SFX are started even when speech is muted (when
using subtitles only mode). This is, for example, noticable in the Sam&Max CD
intro.
SCUMM: Fix Ctrl+t key code combination to affect speech mode.

Formerly, the key code combination didn't unmute speech at all.
SCUMM: Fix non-Towns CJK text rendering
SCUMM: Fix text shadow in The DIG Korean.
SCUMM: Fix Korean/Taiwanese text line break in The DIG
DISTS/REDHAT: Package neverhood.dat
SCI: Small formatting fix.
SCUMM: Implement text shadow in Korean COMI
SCUMM: Refine SMUSH Korean text shadow rendering to match the original version as close as possible
MADS: Clean up _depthStyle usage in DepthSurface class
MADS: Main menu background is now correctly loading
AUDIO: Increment total play time when decoding MP3 data.
MADS: Menuitems now animating correctly for the main menu
MADS: Cleanup of menu item positioning
MADS: Add support to event manager for intercepting events
MADS: Menu item highlighting and selection animation now working
MADS: Main menu selections now working
MADS: Silence GCC warning
MADS: Beginnings of re-implementing text view class