Image gallery test for nsfw images :)) (Patreon)

Sorry for the spam posts today! 

This is just a quick test post, mostly for myself, to see how using the image gallery feature might work for nsfw images, rather than using an attachment. Most of the reason I use the attachment is so that the full nsfw image doesn't pop up in folks' emails or on screen if you click through in public, so depending on how this looks in email, it could be a new option to more easily display nsfw pics, since the current attachment process requires a download on most browsers, but I don't know how most folks are viewing them and whether this might actually be a downgrade. I could potentially include both a gallery pic and an attachment, so if this feature doesn't work well on mobile, for example, perhaps I can do both for awhile. Also, if this pops the full nsfw image in your email anyway, then it's not an option at all lol~ 

Let me know what you think!