add rotate function passed on ekulabuhov@5493dbc
add rotate function passed on ekulabuhov@5493dbc

shaunstanislaus/jimp,neophob/jimp,kustomzone/jimp,nitram509/jimp,neophob/jimp,oliver-moran/jimp,i-mars/jimp,neophob/jimp,mgh/jimp,skoa-h/jimp,skoa-h/jimp,bradparks/jimp__pure_javascript_lib_for_resize_grayscale_image_operations_no_dependencies,kk9599/jimp,mubassirhayat/jimp,weebygames/jimp,selaux/jimp,oliver-moran/jimp,oliver-moran/jimp,mgh/jimp,skoa-h/jimp,bouchertommy/jimp