move dims param to ImageLoader fromStack from init, remove unused valuetype
move dims param to ImageLoader fromStack from init, remove unused valuetype

mikarubi/thunder,broxtronix/thunder,broxtronix/thunder,zhwa/thunder,kunallillaney/thunder,pearsonlab/thunder,poolio/thunder,kcompher/thunder,zhwa/thunder,oliverhuangchao/thunder,mikarubi/thunder,j-friedrich/thunder,thunder-project/thunder,jwittenbach/thunder,pearsonlab/thunder,kunallillaney/thunder,j-friedrich/thunder,oliverhuangchao/thunder,poolio/thunder,kcompher/thunder