Decrease upper bound for NumPy random seed snippet

numpy.random.mtrand bounds at 4294967295.
Update plotting import snippet for rename
Add km/org-remove-title-leader
Disable org-refile-cache
Switch '/' binding to dired-narrow-fuzzy
Set dired-dwim-target
Correct python-shell-* rebindings

I'm not sure how I messed that up so bad initially.