Update UIImage+WebP.h
Update UIImage+WebP.h

Updated header with config block
RoyZeng/iOS-WebP,seanooi/iOS-WebP,RoyZeng/iOS-WebP,waynett/iOS-WebP,bufanwyl/iOS-WebP,LIQC/iOS-WebP,waynett/iOS-WebP,1yvT0s/iOS-WebP,LIQC/iOS-WebP,1yvT0s/iOS-WebP,bufanwyl/iOS-WebP