AVALANCHE: Repair the timer.
FULLPIPE: Started scene02 implementation
TSAGE: Don't assert in PlayStream::getFileOffset() when no data exists

This function returns 0 when no valid voice data is found, at the place
where it's used. This prevents the game asserting during the intro, when
no speech file is present, in platforms with limited disk space
TSAGE: R2R fix for using ladder at bottom of lift shaft
TSAGE: Graphic fix for image flags affecting frame centroid location
AVALANCHE: Fix timer.
AVALANCHE: Fix display of speed state.
FULLPIPE: Do some renaming in scene02
FULLPIPE: More work on scene02
TSAGE: R2R - Add a workaround for the pathfinding issue in vampire maze, remove some useless braces
SCI: proper laura bow 2 script patch for safe issue

fixes one half of bug #6460
FULLPIPE: More work on scene02
FULLPIPE: Complete scene02
TSAGE: R2R - Fix bug in Scene 1950
TSAGE: R2R - Fix missing variable initialization
FULLPIPE: Consolidate lift-related functions in one file
FULLPIPE: Move message handlers into separate file
FULLPIPE: Move sceneIntro to separate file
FULLPIPE: Move scene01 to separate file
FULLPIPE: Move scene02 to separate file