nrf24: implemented some more hardware commands, rename class to Nrf24Hal
       because this is essentially what it is.
Fix FakeCanDriver for unittests.
Remove warning about unused variables.
IODeviceWrapper busy waiting can lead to deadlocks.
Add bool implementation to IOStream.
Add bool unittests to IOStream (passes).
Adapt ArithmeticTraits to new coding style.
Adapt ArithmeticTraits to C++11 constexpr.
Refactor ArithmeticTraits max() and min() functions to static constexpr variables.
Remove AVR32 delay “implementation”.
Merge branch 'develop' into feature/tolerance