Set auto-pause default to `false`

[subhaze]

Due to feedback from CK dev it appears folks think CK is broken due to the pausing/unpausing so this auto-pausing is becoming opt-in.

• [x] Update readme https://github.com/subhaze/sublime_codekit#pausing-codekit
• [x] Update settings https://github.com/subhaze/sublime_codekit/blob/master/CodeKit.sublime-settings#L8

[subhaze]

@bdkjones updated to default with no pausing on lost focus, hopefully less emails will come your way now.