Solved minor bug in controllerFan()

Extruder 2 was checked where extruder 1 should be checked.

If S is left out perhaps it should be silent, but check the spec for
this M code.

Also cosmetic comment changes and spelling corrections in printed
messages

fix DEFAULT_AXIS_STEPS_PER_UNIT minor Z rounding error

(duplicates initialization in Marlin_main.cpp)

Also refactor extruder auto fan logic to simplify further and now only
check every 2.5 seconds

Argument order of lcd_buzz was set to mirror that on tone(). Change
default M300 frequency to something audible.

Conflicts:
	Marlin/Marlin.pde
	Marlin/ultralcd.cpp
	Marlin/ultralcd_implementation_hitachi_HD44780.h

Add (as an option) slower SD transfer mode

128x64 RepRapDiscount Full Graphic Smart Controller support

Make Gen7 1.4+ heater temp sensort pins match silkscreen.

Fix: Build error when EEPROM_SETTINGS is defined and PIDTEMP is undefined

Add new 'callback' edit-menu types that call a function after the edit is done. Use this to display and edit Ki and Kd correctly (removing the scaling first and reapplying it after). Also use it to reset maximum stepwise acceleration rates, after updating mm/s^2 rates via menus. (Previously, changes did nothing to affect planner unless saved back to EEPROM, and the machine reset).

Add calls to updatePID() so that PID loop uses updated values whether set by gcode (it already did this), or by restoring defaults, or loading from EEPROM (it didn't do those last two). Similarly, update the maximum step/s^2 accel rates when the mm/s^2 values are changed - whether by menu edits, restore defaults, or EEPROM read.

Refactor the acceleration rate update logic, and the PID scaling logic, into new functions that can be called from wherever, including the callbacks.

Add menu items to allow the z jerk and e jerk to be viewed/edited in the Control->Motion menu, as per xy jerk.

Conflicts:
	Marlin/language.h

Fixed cardreader.h to resolve issue #440 (Pull Request  #425 missing file)

Removed GIT fragments from language.h

Seems that there was something wrong while merging

M928 logging

Add support for M300: Play beep sound

Final task of the 128x64dots GLCD implementation

Pull requests: #414 #433 #432 #428

regenerated thermistor table 7

Separate PID_MAX from BANG_MAX

HTML removed, Rumba added

The LARGE_FLASH flag allows superfluous features to be excluded
on boards with less memory

The new version of the library means that PANELOLU no longer needs to be
defined in LiquidTWI.h (the library file can be used as is) and the new
version of the library also enables the buzzer on the Panucatt VIKI
panel.

This allows PID_FUNCTIONAL_RANGE to use a maximum duty cycle higher
than PID_MAX. This is useful for powerful heaters to heat quickly in
bang-bang mode, but use a lower duty cycle that is easier to stabilize
in PID mode.