ERC: Set some variables.
Org-Mode: Agenda-files update.
Emacs: Add ag and company to packages.
Emacs: Move narrowing and widening section around.
Emacs: Make C-x t r work with wgrep / ag.
Emacs: (Endless) updates to narrow-or-widen-dwim.

http://endlessparentheses.com/emacs-narrow-or-widen-dwim.html

Adds narrow-to-defun and prefix argument option.

Removes C-c n, just to have an extra user key available!