Fixed Makefile to work with Melzi2 boards on arduino-1.6.x

- also by default use ${HOME}/Arduino as install directory which may be more
sane, especially with arduino packages provided by distributions
- bump arduino version to 106 (this seems to be useless)
- program firmware through the USB serial which is more comfortable way how
to program the firmware
- use 57600 programing speed by default which seems to be more reliable
with arduino bootloaders (at least with those shipped with the Melzi2 boards)

Signed-off-by: Jaroslav Škarvada <jskarvad@redhat.com>

Marlin/Makefile

 
 # Arduino source install directory, and version number
 # On most linuxes this will be /usr/share/arduino
-ARDUINO_INSTALL_DIR  ?= /usr/share/arduino
-ARDUINO_VERSION      ?= 105
+ARDUINO_INSTALL_DIR  ?= ${HOME}/Arduino
+ARDUINO_VERSION      ?= 106
 
 # You can optionally set a path to the avr-gcc tools. Requires a trailing slash. (ex: /usr/local/avr-gcc/bin)
 AVR_TOOLS_PATH ?=
 
 #Programmer configuration
-UPLOAD_RATE        ?= 115200
-AVRDUDE_PROGRAMMER ?= wiring
+UPLOAD_RATE        ?= 57600
+AVRDUDE_PROGRAMMER ?= arduino
 # on most linuxes this will be /dev/ttyACM0 or /dev/ttyACM1 
-UPLOAD_PORT        ?= /dev/arduino
+UPLOAD_PORT        ?= /dev/ttyUSB0
 
 #Directory used to build files in, contains all the build files, from object files to the final hex file
 #on linux it is best to put an absolute path like /home/username/tmp .
 else ifeq  ($(HARDWARE_MOTHERBOARD),66)
 HARDWARE_VARIANT ?= Sanguino
 MCU              ?= atmega1284p
+else ifeq  ($(HARDWARE_MOTHERBOARD),69)
+HARDWARE_VARIANT ?= Sanguino
+MCU              ?= atmega1284p
 
 #Ultimaker
 else ifeq  ($(HARDWARE_MOTHERBOARD),7)
 # Libraries, the "hardware variant" are for boards
 # that derives from that, and their source are present in
 # the main Marlin source directory
-ifeq ($(HARDWARE_VARIANT), arduino)
+ifeq ($(HARDWARE_VARIANT), $(filter $(HARDWARE_VARIANT),arduino Sanguino))
 HARDWARE_DIR = $(ARDUINO_INSTALL_DIR)/hardware
 else
 ifeq ($(shell [ $(ARDUINO_VERSION) -ge 100 ] && echo true), true)
 HARDWARE_DIR = ../ArduinoAddons/Arduino_0.xx
 endif
 endif
-HARDWARE_SRC = $(HARDWARE_DIR)/$(HARDWARE_VARIANT)/cores/arduino
+HARDWARE_SRC = $(HARDWARE_DIR)/marlin/avr/cores/arduino
 
 TARGET = $(notdir $(CURDIR))
 
 VPATH = .
 VPATH += $(BUILD_DIR)
 VPATH += $(HARDWARE_SRC)
-ifeq ($(HARDWARE_VARIANT), $(filter $(HARDWARE_VARIANT),arduino Teensy))
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/LiquidCrystal
-VPATH += $(ARDUINO_INSTALL_DIR)/libraries/SPI
+ifeq ($(HARDWARE_VARIANT), $(filter $(HARDWARE_VARIANT),arduino Teensy Sanguino))
+VPATH += $(HARDWARE_DIR)/marlin/avr/libraries/LiquidCrystal/src
+VPATH += $(HARDWARE_DIR)/marlin/avr/libraries/SPI
 ifeq ($(LIQUID_TWI2), 1)
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire
 VPATH += $(ARDUINO_INSTALL_DIR)/libraries/Wire/utility
 HARDWARE_SUB_VARIANT ?= mega
 VPATH += $(ARDUINO_INSTALL_DIR)/hardware/arduino/variants/$(HARDWARE_SUB_VARIANT)
 else
+ifeq ($(HARDWARE_VARIANT), Sanguino)
+VPATH += $(HARDWARE_DIR)/marlin/avr/variants/sanguino
+else
 HARDWARE_SUB_VARIANT ?= standard
 VPATH += $(HARDWARE_DIR)/$(HARDWARE_VARIANT)/variants/$(HARDWARE_SUB_VARIANT)
 endif
+endif
 SRC = wiring.c \
 	wiring_analog.c wiring_digital.c \
 	wiring_pulse.c \
-	wiring_shift.c WInterrupts.c
+	wiring_shift.c WInterrupts.c hooks.c
 ifeq ($(HARDWARE_VARIANT), Teensy)
 SRC = wiring.c
 VPATH += $(ARDUINO_INSTALL_DIR)/hardware/teensy/cores/teensy