add working routines to turn the mc1322x radio on and off
Use the RTC only as the main timer.

This is a major change to how the main tick interrupt is handled on
the mc1322x platforms. Instead of using two timer resources, TMR0 and
RTC, this patch unifies all the timers to use the RTC. This is enabled by
implementing etimers as scheduled rtimers. The main advantage (aside
from freeing TMR0 for general use) is have the Contiki timebase come
from the same source that will be used for sleeping and wakeup.
set the pin defaults properly to reduce current consumption on
sleeping M12s.
Merge pull request #109 from malvira/use-rtc-factor

Improvments to enable low-power mode on mc1322x
Adjusted names.
Fixed Win32 'platform build'.
Use plain ASCII chars for lines on Win32 console CTK.
Merge pull request #121 from oliverschmidt/master

Several minor adjustments.
There's no point in ctk_restore() for standalone GUI builds.
Merge pull request #122 from oliverschmidt/master

There's no point in ctk_restore() for standalone GUI builds.