Update to deft 0.5.1 with local changes.
Add initial configuration for EasyPG.
Ask for confirmation before closing Emacs.

Stops me from closing Emacs with an accidental C-x C-c.
Skip exporting text before first heading (org mode).

I often have metadata in a file before the first heading, and this metadata
has no relevance outside of the org file.  So, do not export it.