add GuiPolygonElementRenderer
add GuiColorizedTextElementRenderer
add Gui3DBorderElementRendere
add Gui3DSplitterElementRenderer
add GuiImageFrameRenderer
fix some issues in renderers
add GuiGradientBackgroundRenderer
add GuiSolidBorderRenderer
add CachedCharMeasurerAllocator
add CachedCoreTextFontAllocator
add ICoreGraphicsResourceManager
add CoreTextFontPackage
fix time issue in vlpp
add CocoaAsyncService, to rewrite in GDC & NSOperation & NSOperationQueue
other fixes