Fixed spritesheet and gif sizes for CATSET <3

All spritesheet frames and gifs are now the same resolution of 40 x 40 pixels.

It should be a lot easier to use this asset pack without having to fiddle around with each spritesheet's/gif's positioning. Some fiddling might be needed with the wallgrab and wallclimb animations though.

I probably could have gotten away with making them 32 x 32, but I like to keep some extra empty space around, just in case I add more animations that might need it. 

P.S. This was my first asset pack, and I made the mistake of publishing the animations in different sizes. I apologize. Luckily I didn't make the same mistake with my other asset packs and now this one is finally fixed :) At least it should be, but please let me know if there are any other problems.