Add auto compl-popup, gdsu() completion.

Add:
	vimrc
		-Add automatic completion popup-menu to alphanumeric keystrokes in
		`insert` mode.

	zshrc
		-Add `_gdsu_compl()`, for `gdsu()` completion.

	vim/snippets
		-Delete `snipMate` snippest directory, as it will be replaced by
		an `ultisnips` dir.