upload keymap.cson to gist
:green_heart: send null instead of empty string for missing file
download keymap.cson and replace user content
:green_heart: send non-empty string for missing file
:fire: no more debug logs for async helper
:white_check_mark: always send content for keymaps, or it means to delete it
Merge pull request #9 from Hackafe/sync_keymap

Sync keymap