feature request: working offline

[medyagh]

Thanks for this neat tool ! I have a feature request, that once my app has cached an image locally. it should be able to load the image without having to talk the remote if I unplug my internet.

some remote hosting websites have a too short of cache expiration and it causes the proxy to keep fetching the image from remote.

current error is :

Error fetching remote image: Get https: ...: no such host