Add cropped/scaled animation gifs.

animations/*.gif
	-Add four animation gifs, cropped and scaled to `600x600 px`.
Add smaller animation copies to README.md.

animations/(200x200, 600x600)/
	-Add subdirs for `gif`s of specific sizes.
	-Move existing `gif`s to `600x600/`, and add `200x200px` copies
	to `200x200/` for display in `README.md`.

README.md
	-Add links to the animations inside `animations/200x200/`.
Resize 200x200 gifs to 170x170.

animations/(200x200 -> 170x170)/*
	-Resize all `200x200px` `gif`s to `170x170px`, so as to fit in one line
	of the compiled `README.md`.
Merge branch 'feature/animations' into develop