Make page breaks nicer
Remove auto-complete

The package just sucks:

* It causes all sorts of display issues, especially with whitespace
  mode.
* The completion popup fails to update in time.
* It causes all sorts of hassle by binding to TAB, especially in
  combination with yasnippet.  It's never clear whether a snippet will
  now be expanded or whether completion takes place.
Remove magithub

I never used it.