Add :load clause for "filladapt"

Without this, one is stuck loading filladapt manually.  In the comments,
filladapt.el states:

```
	;; Since this package replaces existing Emacs functions, it cannot
	;; be autoloaded.  Save this in a file named filladapt.el in a
	;; Lisp directory that Emacs knows about, byte-compile it and put
	;;    (require 'filladapt)
	;; in your .emacs file.
```

Closes #1876