Sensor: pure virtual dtor
GPIOConsumer: protect ReleasePins() member
HCSR04,HCSR501: protect ReleasePins() member
HCSR04,HCSR501: Call ReleasePins() member in dtor
Update README.md
GPIOConsumer: fix include gaurds
Add licensing note to README
Remove licensing information from all source and header files
Update license years
Update README.md
Sensor: fix include guard typo
Core: remove wiringPI Phys setup function
gitignore: do not track netbeans folder or dependencies folder
GPIOConsumer: add GetPins member and change ReleasePins modifier to private; GPIOManager: inherit GPIOConsumer and implementation
gitignore: do not ignore CMakeLists files
CMakeLists: automatically download and use wiringPi

Raspboop will automatically fetch the latest version of the wiringPi
library from Github (https://www.github.com/WiringPi/WiringPi),
extract the zip file, build wiringPi, and create a hard link to the
library with an appropriate naming convention for CMake.

Users do not need to have wiringPi on their system before building
Raspboop.