Update ultralcd_st7920_u8glib_rrd.h

Filament Runout Sensor Feature

Simplify manage_heater

- Make separate get_pid_output(e) and get_pid_output_bed() function
- Reduce size of manage_heater function
- Hopefully work around linker errors

Fix missing temp_error declarations

- Fix for #1591 replacing #1595

Macro indirection for stepper drivers + Support for TMC26X and L6470 Stepper Drivers

update

The max acceleration limiting was in wrong place.

Added option to set Travel Acceleration (non printing moves).
The M204 options was a non sense (S for printing moves and T for retract
moves).

It has been changed to:
P = Printing moves
R = Retract only (no X, Y, Z) moves
T = Travel (non
printing) moves

I will add this info o G-Code wiki in reprap.org. I also advise to put
this info in Marlin next version changelog.

I forgot to enclousure the variable with #ifdef

removed the link as the software i had did not work, nor does anyone hardly use irc chat but just hang out there

Conflicts:
	Marlin/Marlin_main.cpp
	Marlin/stepper.cpp

fix a handful of cases where strtod() was cast to int, instead of just using strtol()

update

fix typo in delta example config introduced in commit 697ee2dc

Fix controller fan

commit 697ee2dc

With this change a mechanical or optical switch may be used to check the
availability of the filament and when the filament runs out an M600
(filament change) command is issued. This is only done while printing
with an SD card.

This feature was requested several times (issue #679), but the requests
were not accepted since it was believed that this situation should be
handled at host side. However during an SD print the control is totally
on firmware and I think that during an SD print it should be handled by
the firmware.

The original code was posted at reprap forum
(http://forums.reprap.org/read.php?1,297350) by Lazymonk. I have only
corrected some bugs of the code and improved it by adding definitions to
the configuration.h in order to make it more standardized.

More sanity-checking for ABL

- Moved sanity-checks to Marlin_main.cpp
- Applied to other configuration files
- Fixed formatting of ABL output
- Passing verbose level to probe_pt
- Miscellaneous cleanup
- Put CONFIG_STEPPERS_TOSHIBA into Configuration.h

Make sure a ROM is selected for ULTRA_LCD

Fixes gCode handling of comments and escaped characters

Fix compile error in gcode_G29

- A redo of #1576, which missed topo_flag
- Always set verbose_level

Minor typos in the README