There’s no need to ask users to uncomment Max Endstop pins when they
have them. These will be set to -1 later if the endstop option is
disabled.

#1405 includes some changes to pins.h for a 4th extruder. This commit
applies those changes. It also deals with a possible problem with
SENSITIVE_PINS.

Hopefully this is helpful to organization and future expansion….

EEPROM data not aligned

Moved #endif to allow filament settings to print.

Added PIDTEMP dummy write to align EEPROM read/write operation.

repair Bootsplash

Fixing the language files for the 4th extruder

Add 4th extruder

Add 4th extruder

Add 4th extruder

All the additions look proper. I can't think of any other extruder-count-related items that you might have missed. So, with some optimism, I will merge this for testing.

Add PID_dT in temeprature.cpp

Proposed fix to #1379. Printrboard I2C LCD support

Pins 2 and 3 are probably general-use pins, since the filament sensor
uses pin 2.

Diverged from origin

Githun insert this line when i merge with actual Branch development...

Conflicts:
	Marlin/temperature.cpp

Borrow from Ultimaker to fix MAX6675 SPI conflict

Branches diverged

Changes to temperature.cpp from Ultimaker fork, intended to address
#1226 and #1227

Formatting cleanup of quiet sources

Show Custom M_Code for Z-Probe Offset when entering M503

Done

Fix Issue #1356 – remove EXTRUDER1_Z_OFFSET

This define is not used.

Changes to temperature.cpp from Ultimaker fork, intended to address
#1226 and #1227