Add export option

[EHMilon]

As a web developer, many times I have to work with a lot of images. For making a good user experience and load website faster, sometime we need to change the resulation, sometime large image need to compress. Suppose an image size is 5 MB. it will make long time to load, so to reduce quality is very effective way. To compress this image, we have to open photoshop or other online editor.

So please add export option. Then we don't have to go the other place. It will make this extension more helpful.
My request to you, please add
1. Change the regulation option.
2. Changing image Quality option.

@Tyriar