* Removed some superfluous headers from various files.
* Timer Tributary:
  * Spawn the dequeueing thread as DORMANT from now on, and explicitly wake
    it when done initializing it.
  * Implemented timerTribC::initializeAllQueues()
  * Implemented timerTribC::newTimerDeviceNotification().
  * Fleshed out timerTribC::enableQueue().
  * Rectified a nomenclature mistake where I was calling microseconds
    nanoseconds.

* i8254:
  * Renamed the ambit definition macros to better reflect what they define.
  * Updated the conversion logic to properly convert the nanosecond API
    into the internal microsecond granular chip's CLK pulses.
  * Updated documentation to match changes.

* IBM-PC Timer Control mod: Fixed bugs in the Timer Filter API's filters.
* panic(): Fixed the call sequence for CLI and HLT.