chore(vim): turn on case-sensitive sorting in NERDTree
chore(vim): turn on case-sensitive sorting in NERDTree

To match default sort order you get from most UNIX tools (like `ls`,
`git ls-files` etc).

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent