COMMON: Make XCode 5.0.1 happier
TSAGE: Fix CID 1003781, 1002422, 1003171
FULLPIPE: Implement sceneHandlerIntro()
FULLPIPE: Make BaseModalObject pure virtual
TSAGE: Removed Symbion compilation fix, which doesn't work
AVALANCHE: Fix CID 1109677, 1109678, 1109694, 1109695
AVALANCHE: Fix CID 1109696, 1109697
WINTERMUTE: Fix compile errors in XCode 5 caused by nullptr-issues.
WINTERMUTE: Deconstify UIObject::getHeight() to fix a shadowed overload.
WINTERMUTE: Change BaseObject::getHeight() to return int32 instead of int.
WINTERMUTE: Transfer booleans explicitly when saving/loading.
TSAGE: Fix CID 1088575, 1003719, 1003716  (3 real bugs)
FULLPIPE: Implement ModalIntro::init()
FULLPIPE: Implement ModalIntro::idle()
FULLPIPE: Enable intro
FULLPIPE: Implement ModalIntro::update()
FULLPIPE: Fix intro playback. Still hangs on part2
TSAGE: Fix CID 1003935, 1003723, 1002377 and 1002376
TSAGE: Removed unneeded R2R variable _v56AAB
TSAGE: Removed more unused R2R variables