Added Image Shrink module

Basically, the image shrink module lets users choose a maximum image size for imgur images if they don't want to have to load extremely large images. For instance, a 5000px wide image of a few words doesn't need to be loaded when it can be seen perfectly fine at 1024px. It uses imgur's thumbnails, specified here: https://api.imgur.com/models/image#thumbs. Whenever an image is shrunken, a link to the original image is added to the post as well.
we actually used to offer this and so few people used it we ended up removing it - the main reason being that it actually caused a lot of problems once imgur started changing the number of characters in its hashes.

@andytuba I can't believe you forgot ;-)

https://github.com/honestbleeps/Reddit-Enhancement-Suite/blob/58eee751d5919dd549f48c3957ab9f0295f54dec/lib/reddit_enhancement_suite.user.js#L10046 for a look into ancient history...

how thoroughly have you tested this?