Porting iotivity constrained to arduino

The port target the arduino AVR(Mega2560)and ARM architectures, mostly arduino SAMD(arduino MKRZERO, though andy SAMD board should work) as well as the arduino Due. Though most feature should be supported on SAMD boards, use the arduino Due for more stable deployment of secuirty features. The ipadapter for network requirement is based around the Wiznet w5500 shield, dependant arduino C++ libraries were adapted by providing C wrappers. an SD card is used to provide pesistant storage for security build.this is made available via the C adapter libarduino-sdfat