SCUMM: Add support for CD audio tracks in the Steam versions of Loom

Many Thanks to Ben Castricum for the original patch
OPENGLSDL: Don't ignore events after user-initiated resizes.
CGE2: Add extra clipping to Bitmap::hide
Merge pull request #470 from bluegr/Lucasarts_Steam

SCUMM: Add support for Steam versions of Indy 3, Indy 4, Loom and Dig
SCUMM: Remove empty line before license header.
SCUMM: Use spaces instead of tabs in comments.
SCUMM: Remove unused variable.
SCUMM: Slight formatting fixes.
SCUMM: Fix a subtle bug in Sound::getCDStatus() for Loom Steam
SCUMM: Simplify index file handling for Steam versions.

This also makes sure that all extra needed detection data for the Steam
releases is located inside detection.cpp.
SCUMM: Cleanup.
I18N: Update French translation
SWORD1: Tweak MPEG-2 cutscenes error message

Beside making the message slightly better imho, it is also now
identical to the same message in BS2 and also more coherent with
the DXA message.
PRINCE: checkSeq() update
PRINCE: installObjects(), setObjId(), O_PUTOBJECT(), O_REMOBJECT(). checkMob(), showObjects(), O_GETRND() update
Updated 1.7.0 release date in German NEWS (Neues).
Merge pull request #477 from SimSaw/master

NEWS: Updated 1.7.0 release date in German NEWS (Neues).
I18N: Update Italian translation (from patch #1608)
PRINCE: setVoice() fix
NEVERHOOD: Play a single sound when losing the memory puzzle (bug #6672)

When the memory puzzle is reset, each revealed tile gets hidden again.
When a lot of tiles were hidden, the multiple clicking sounds would
fill the available sound slots. To avoid this, only a single click is
sounded when losing