Update crop-host.js

Added scope variables to store dimension of original and resized image both cropped and not cropped
Resized: 
result-width,result-height -> cropped image dimensions
result-x,result-y -> cropped coordinates
original-width,original-height -> uploaded image dimensions
original-crop-width,original-crop-height,original-crop-x,original-crop-y -> uploaded image dimension and crop coordinates