Changed ce_pin and csn_pin to uint16_t so the library supports GPIO...

Changed ce_pin and csn_pin to uint16_t so the library supports GPIO identifiers higher than 255 (Minnowboard)

Makefile.inc

-OS=LINUX
-SOC=unknown
-DRIVER=SPIDEV
-CFLAGS= -Ofast -Wall -pthread 
-PREFIX=/usr/local
-REMOTE_PREFIX=/usr/local
-LIB=rf24
-LIBNAME=librf24.so.1.1.6
-LIB_VERSION=1.1.6
-LIBSYMLINKS=librf24.so.1.1 librf24.so.1 librf24.so
-LIBDEPRECATE=librf24-bcm.so
-CC=gcc
-CXX=g++
-LIB_DIR=/usr/local/lib
-REMOTE_LIB_DIR=/usr/local/lib
-HEADER_DIR=/usr/local/include/RF24
-REMOTE_HEADER_DIR=/usr/local/include/RF24
-DRIVER_DIR=utility/SPIDEV
-ARCH_DIR=utility
-SHARED_LINKER_FLAGS= -pthread -shared -Wl,-soname,librf24.so
-LDCONFIG=ldconfig
-REMOTE_LDCONFIG=/sbin/ldconfig
-EXAMPLES_DIR=/usr/local/bin
-REMOTE_EXAMPLES_DIR=/usr/local/bin

utility/includes.h

-  
-#ifndef __RF24_INCLUDES_H__
-#define __RF24_INCLUDES_H__
-
-#define RF24_SPIDEV
-  #include "SPIDEV/RF24_arch_config.h"
-  #include "SPIDEV/interrupt.h"
-#endif