test: remove wiringpi as cmake target requirement when making executables
test: add sensors test
Essentials: Add Core module
Core: Integrate Core; Init and Deinit implementations
Core: change type of Init method parameter to int
CMakeLists: fix build - link raspboop libraries and find wiringPi
Sensor: dtor empty implementation
GPIOConsumer: dtor empty implementation
HCSR04: remove Trigger() member
HCSR04: Sense() implementation
HCSR04: ReleasePins implementation
HCSR04: fix Sense() digitalRead
HCSR04: change TRIG to TriggerPin
HCSR501: add Create factory empty implementation
HCSR501: Create implementation
HCSR501: ctor implementation
HCSR501: ReleasePins empty member implementation
HCSR501: Sense() implementation
HCSR501: IsSignalled() implementation
Remove nested namespaces -- too convoluted