Removed minibufexpl

Maybe this is what's making my shit all slow and shit
Revert "Removed minibufexpl"

This reverts commit d99a8d3e1324e0f58e507fc80c692c57cb6a7062.
Add neocomplcache
Bunch of changes to vim config stuff

I can't be bothered to write a commit message for this; I've made a ton
of changes.