Introduce endstop interrupts

Update to Danish language 10/11-2016

This allows M104 to pass the F and B parameters to enable autotemp as well

Advance has nothing todo with Z_AXIS, strange copy&paste error?

Update Japanese translation

Replace const bool with #define for consistency

Only adjust spacing

Printer Stats / Completed prints line doesn't fit in display (when german)

Save some cycle inside the planner

Fix DIRECT_MIXING_IN_G1 to preserve the previous mix

bump -std in Makefile to c++11

Fix G30 with limits, print correct probe XY

still a few bytes bigger than with arduino but nothing major

needed for constexpr

If ENDSTOP_INTERRUPTS_FEATURE is enabled this tries to set up interrupt routines
for all used endstop pins. If this worked without errors, `endstops.update()` is called
only if one of the endstops changed its state.

The new interrupt routines do not really check the endstops and react upon them. All what they
do, is to set a flag if it makes sense to call the endstop test we are used to.

This can be used on:
* ARM (DUE) based boards - all pins can raise interrupts,
* RAMPS - all 6 endstop pins plus some other on EXT-2 can raise interrupts,
* RAMPS based boards - as long the designers did not change the pins for the endstops or at least left enough,
* all boards, if there are enough pins that can raise interrupts, and you are willing/able to swap with pins dedicated to other purpose.

planner.h:
fan speed is used to set integer variables, so no need for long.
Basicaly a byte should be enough for all the fan things, as it's 0-255?

planner.cpp:
Save some float multiplications.
We could squeeze out even more by defining feedrate_percentage,
saved_feedrate_percentage and flow_percentage as float instead of int.
Everytime they are used in the time-critical planner, they are casted to
float and multiplied by 0.01. Not done jet, as they are used in LCD menu
functions I don't know well enough.

Store mix factors as reciprocals and multiply

Extended host support: M155 Auto temp report, M115 capabilities

Follow up the PR #5167 (Add Turkish Language) again, etc

Remove useless line from stepper ISR

Megatronics 3.0 has no SD-Card detect

The flag is already set inside planner.get_current_block(). Doing it
twice isn't making it better..

・Update forgotten K8400\Dual-head\Configuration.h
・Adjust spacing

Give instant feedback for filament change