1.26 2014-08-12 Fixed a Teensy 2.0 compile problem due yield() not available on Teensy < 3.0.
Adjusted the algorithm of RH_RF69::temperatureRead() to more closely reflect reality.
Added functions to RHGenericDriver to get driver packet statistics: rxBad(), rxGood(), txGood().
Added RH_RF69::printRegisters().
RH_RF95::printRegisters() was incorrectly printing the register index instead of the address. Reported by Phang Moh Lim.
RH_RF95, added definitions for some more registers that are usable in LoRa mode.
RH_RF95::setTxPower now uses RH_RF95_PA_DAC_ENABLE to achieve 21, 22 and 23dBm.
RH_RF95, updated power output measurements.
Testing RH_RF69 on Teensy 3.1 with RF69 on PJRC breakout board. OK.
Improvements so RadioHead will build under Arduino where SPI is not supported, such as  ATTiny.
Improvements so RadioHead will build for ATTiny using Arduino IDE and tinycore arduino-tiny-0100-0018.zip.
Testing RH_ASK on ATTiny85. Reduced RAM footprint.  Added helpful documentation. Caution: RAM memory is *very* tight on this platform.
RH_RF22 and RH_RF69, added setIdleMode() function to allow the idle mode radio operating state to be controlled for lower idle power consumption at the expense of slower transitions to TX and RX.