Switched from printf_P to Serial.print to prevent all kinds of nasty
PROGMEM troubles.
Distinguish between 32- and 16-bit architectures when reading ptrs from
flash.
Ditched #defines MINIMAL & SERIAL_DEBUG.
Debugging code is now only included when DEBUG is defined.
If your target (e.g. ATTiny) cannot handle the extra code, then don't
enable DEBUG.
#defining DEBUG will now also output a register-dump on calling begin()
of NRF24 driver to aid in (connection) problems.
Yveaux
Henrik Ekblad