Reorganized header inclusions.
changed: GraphicsApplicationBase::UpdateFrame()

Deleted a redundant call of GetGameWindowManager().OnMainLoopFinished(). GetGameWindowManager_Win32().OnMainLoopFinished() is called in ::MainLoop().
changed: LinkIncremental from true to false.
updated: TextureFontTest
cleaned up: the source code
cleaned up: the source code
updated: MultibyteFontTest
updated: EnvMapTest