Add submodule: KYUnlockCodeManager
Implement unlcok code in settings view done
When "Location Service" is locked, show a lock icon instead of map icon
Unlock "Location Service" with invitation code done. Close #20
1. Show code input view when click the map button in lock status;
2. Unlock "Location Service" when entered a valid code
:o: v0.5.3
Modify Master/Config.*: Add KYUnlockCodeManager related macro
Lock Dex & 6PMs buttons when "Location Service" is locked
SettingTableViewController: Post notifi to MainViewController when press "Request DEX"
Update submodule: KYUnlockCodeManager
Manage "Location Service"'s switch button in lock state done
:o: v0.5.3. Fix Invitation-Only