Set completion function more consistently in robe-mode-hook
When ag is installed, require the ag.el package
Decide at compile time whether to patch certain functions
Use user-emacs-directory var in place of "~/.emacs.d"
Don't shadow OS X binding for M-h in org-mode

C-M-h (mark-defun) works just as well.
Add flymake-yaml
Also copy $LANG and $LC_CTYPE from the shell environment on OS X
Merge remote-tracking branch 'purcell/master'