Build tool: ensure code signature on all OSX bins.
Make OSX ZIP packages with ditto, to preserve file attributes.
Use ditto when unpacking a new release, to make sure exnteded attributes are kept.
Remove symlinks in node_modules when building ZIPs.
Handle HiDPI screens in Linux alert (new SystemFlash).
Fixes to alerts in non HiDPI Linux systems.
Final fixes to Linux alert spacing and heights.
Updated shebangs for OSX/Linux alerts.
Replaced Windows Lock with stronger C-based version, refactored and simplified module structure.
Fixed lock.kill() call.
Lock: Ensure valid password length.
Lock: Don't expect a callback on stop(), cause we ain't getting one.
Handle no logged user when firing lock.
Lock: clearTimeout when stopping if timer 'no logged user' exists.
Fixed prey-lock shebangs to avoid bashisms.