Arduino support / API class inheritance

[techie66]

This library could use out-of-the-box Arduino support.
It should be simple to do by checking for #ifdef Arduino_h and providing a different API that doesn't require file descriptors.

[techie66]

New plan. Create a base class that merely interprets a byte stream. Arduino support can be a simple wrapper class around that. Also I2C, Serial, etc on GNU/Linux as well.