:lipstick:
Use event.keyCode when KeymapManager::dvorakQwertyHackEnabled is true

Props to @dommccurdy for researching this approach.

This will cause the keymap to work correctly when dvork-qwerty is
enabled on OS X. Now we need to auto detect this so users don’t need
to enable this setting manually.
Automatically enable Dvorak-Qwerty hack if that layout is chosen on OS X
Move property to properties section
Upgrade keyboard-layout for non-mac platform fixes
Rename 'hack' to 'workaround' for less changed language
Merge pull request #51 from atom/ns-dvorak-qwerty

Automatically apply workaround for Dvorak-Qwerty keyboards on OS X