Added new periphery hardware (PCAL6524 GPIO extender and AT42QT1050 touch sensor) to the PowerManagement, including unit tests.
updated all file headers to 2019
removed the mysterious module.h file in the unittests directory (again!)
Further enhanced the motor driver unit test.
Reverted some modifications to the MotorDriver unit test for better stability.
Improved motor driver unit test for better identification of errors.
Implemented brutforcing of BQ27500 sealed keys.
All contents of the os/ folder has been moved one directory up.
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