Revert "Delete undo dir for Vim"

This reverts commit 63f9b71b1514581691c5384157d6efd0602a478f.

Conflicts:
	.vimrc.basic

# Please enter the commit message for your changes. Lines starting
# with '#' will be kept; you may remove them yourself if you want to.
# An empty message aborts the commit.
# On branch develop
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   .vimrc.basic
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	bin/subl
#	bin/vimcat