Add teensy revision folder for Orthodox Rev3 (#2510)

* Add Rev3 Teensy for Orthodox

* MOve bootloader defines into revision folders

* Finishing touches

keyboards/orthodox/rules.mk

@@ -4,7 +4,6 @@ SRC += matrix.c \
 	   serial.c
 
 # MCU name
-#MCU = at90usb1287
 MCU = atmega32u4
 
 # Processor frequency.
@@ -43,7 +42,6 @@ F_USB = $(F_CPU)
 #     This definition is optional, and if your keyboard supports multiple bootloaders of
 #     different sizes, comment this out, and the correct address will be loaded 
 #     automatically (+60). See bootloader.mk for all options.
-BOOTLOADER = caterina
 
 # Interrupt driven control endpoint task(+60)
 OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT