[WPF] Implemented GetPixel and SetPixel for bitmaps
[WPF] Implemented GetPixel and SetPixel for bitmaps

Also, when loading an image convert it to 96 dpi if
it has a different dpi.

cra0zy/xwt,steffenWi/xwt,directhex/xwt,lytico/xwt,mminns/xwt,residuum/xwt,hwthomas/xwt,iainx/xwt,antmicro/xwt,sevoku/xwt,akrisiun/xwt,hamekoz/xwt,mono/xwt,TheBrainTech/xwt,mminns/xwt