Clip images to document bounds

This adds an option ```clip-all-images-to-document-bounds``` to clip the images getting exported to the document bounds. The exception is any image with vector masks will always get clipped to the layer mask and not the document bounds.
from observation, the only time enabled is present is when it's value it was ```enabled:false```. That is when the mask is enabled the property was not defined on the object so it would also be falsy. This code looks like it was expecting it to be ```enabled:true``` but that is not what I saw.