Add gen 7 Pokémon images

[Raia]

Progress:

• Add gen 7 large sprites
• Add gen 7 minisprites

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Notes:

I avoided uploading unnecessary duplicates for Minior, so we'll need to handle its forms differently. All Minior-Meteor share the same sprite; same with all shiny Minior-Core.

/regular/774-meteor.png
/shiny/774-meteor.png
/shiny/774-shiny.png

[AlMcKinlay]

Just merge this one in and get the mini sprites in another one. We don't need PRs to be perfect. IF they don't break any existing functionality, then it's good.

[AlMcKinlay]

So, I just tried these and realised they are 256x256. The gen 6 ones we have are 120x120.

edit: If we scale them down, the small ones look really small, and if we trim off some of it, then we lose some of the bigger ones :-\

[AlMcKinlay]

Changed my mind. Scaling looks fine. Either add

.pokemon-container img { width: 120px; } or I'll add it into my branch. Either way, happy.

[Raia]

@YaManicKill, I'll let you take care of it in your branch. Will merge after tests are done.