Changed mime type for MNG from image/png to image/x-mng and JNG to image/x-jng
Changed mime type for MNG from image/png to image/x-mng and JNG to image/x-jng


UniQP/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,kwm81/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,UniQP/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick,kwm81/ImageMagick,UniQP/ImageMagick,Danack/ImageMagick,kwm81/ImageMagick