Add `fill-column-indicator`
Add `smartparens`
Remove `ruby-end`
Remove my smartparens config for "|"

It's already supplied.
Map keys: command -> meta, option -> super
Use correct repo url for `smartparens`
Use smartparens keybindings
Remove `autopair` as it's replaced by smartparens
Turn on fci-mode in programming modes
Remove `perspective`