Fix missing import Control.Applicative.
Update to work with process 1.2 package.
Fix broken code in DF process handling.

How could this even compile like this. Well, it's fixed now.
Revert "Rewrite notification system to use jquery.growl-bootstrap"

This reverts commit 9cbf41dc2421f4203619b9e9c68d8f15abe1afba.

This revert is to just to make playing interface work.