Update revisions.txt

Author: Federico Fissore

build/shared/revisions.txt

@@ -31,6 +31,7 @@ ARDUINO 1.6.5
 * Added SPI Transactions to TFT lib
 * Stepper: support for 5-phase/5-wires motors. Thanks @rdodesigns
 * Stepper: increased precision in timing calculations. Thanks @ekozlenko
+* Firmata and Temboo: dropped our vesions, tagged released are downloaded from their respective git repos
 
 [core]
 * AVR: delayMicroseconds(..) doesn't hang if called with 0. Thanks @cano64