RF24Frontend: remote driver for a nRF24l01 device using RF24 library interface

Goal:

provide interface for communication via nRF24L01 modules from devices that don't have SPI/GPIO - typically a PC, linux boxes/development boards
keep (almost) the same interface as RF24 library so applications can be reused
libraries utilizing RF24 (RF24Network, RF24Mesh) can also use RF24Frontend
primary developed and tested on Linux, but should be possible to adapt for other OSes

Supported communication interfaces:

VUsb
Serial

##Installation for now no shared libraries, no installation.

switch do RF24Frontend/examples
make
precondition for running examples: prepared VUsb or serial RF24 device, proper firmware uploaded, connected in appropriate way

##Usage Full RF24 library interface is available via RF24Frontend class. See RF24Frontend/examples/*.cpp

instantiate an interface driver:

    RF24ComSerial rf24_serialdev("/dev/ttyACM0");
    or
    RF24ComVUsb rf24_vusbdev;

instantiate RF24Frontend, give the driver as a param:

    RF24Frontend radio(rf24_serialdev);
    or
    RF24Frontend radio(rf24_vusbdev);

use the RF24Frontend instance the same way as RF24:

    radio.begin();
    radio.setChannel(40);
    ...
    ...