[Azoth Autoidler] Totally no sense in 1-second polling.
[Azoth Autoidler] Cleaned up idle time calculator code.

Why one would ever need to play with QDateTimes like this?
[Azoth Autoidler] Use ApplicationServices to get idle time on Mac.

Previous version of the code thoroughly copypasted from Psi doesn't work on
64-bit systems and was outdated already around Mac OS X 10.3. Probably time
to move on and embrace 64 bits in 2014.