Create a convenience method for retrieving Image objects with dimensions and imagedata set.

[codeconsole]

Similar to #161

[glaforge]

Do you have a good non-CPU intensive / efficient way of doing that?
Shouldn't it be an issue for the GAE issue tracker?

[codeconsole]

I am not sure of the CPU intensity, but I was probably just going to implement it as discussed in the GAE ticket I created a long time ago.

I seriously doubt the GAE guys will ever bother implementing it so prob not worth the hassle of creating a new ticket there.

[glaforge]

Implement with the reader over the blob and create the image out of that?
I remembered the image transform that you mentioned too, that's what I had in mind, but the above is certainly better.

On the GAE guys, I know some of them personally, so I can always ask, the sole risk is being answered no ;-)