FULLPIPE: Implement ModalSaveGame::setup()
FULLPIPE: Fix ModalSaveGame::setup()
CGE: Replace magic numbers with defines.
SCI: Fix compilation due to wrong preprocessor directive.
PS2: Fix hardcoded library settings to allow building against old SDK.

The autodetection should be fixed or modified to remove these hardcoded
library enables. For now, we add another minor HACK to disable the
troublesome Tremor Ogg Vorbis enable on older SDK, which should fix the
buildbot builds.
FULLPIPE: Implement ModalSaveGame::processMouse()
FULLPIPE: Implement ModalSaveGame::handleMessage()
FULLPIPE: Implement ModalSaveGame::update()
FULLPIPE: Implement ModalSaveGame::saveload()
FULLPIPE: Implement ModalSaveGame::getFileInfo() and stubbed saveload support
FULLPIPE: Implement MctlCompound::removeObject()
FULLPIPE: Implement MctlCompound::replaceNodeX()
FULLPIPE: Implement MovGraphLink::~MovGraphLink()
FULLPIPE: Implement Movement::~Movement()
FULLPIPE: Implement Scene::~Scene()
FULLPIPE: Implement Scene::stopAllSounds()
FULLPIPE: Removed couple of PtrList usages for code clarity
FULLPIPE: ditto for Scene::_messageQueueList
FULLPIPE: Remove unused class variable
FULLPIPE: Remove PtrList usage in gfx.cpp