Fix README key binding for prelude-smart-open-line-above.
[#421] Bind prelude-smart-open-line-above to M-O
Add M-O and s-o as key bindings for prelude-smart-open-line-above.
Merge pull request #421 from seanfisk/fix-readme-keybinding

Fix README key binding for prelude-smart-open-line-above.
Really fix key bindings, once and for all.
Add period.
Merge pull request #422 from seanfisk/fix-readme-keybindings-again

Fix README keybindings again
Pull in upstream changes