Add a method for loading a section of an image
Add a method for loading a section of an image

Usefull when dealing with large images

huonw/image,hetzge/image,PistonDevelopers/image,xanium4332/image,tomaka/image,ruud-v-a/image,theotherphil/image,twoodford/image,PistonDevelopers/image,mbrubeck/image,nwin/rust-image,JaySon-Huang/image,bvssvni/image,TyOverby/rust-image,dtwood/piston-image,lady-segfault/image