* Fix some 8-bit Teensyduino compile warnings

-Override Teensyduino legacy NOT_A_PIN 127 define
-some fixups for Printrboard_RevF pins

* Proper cleanup of Printrboard Rev.F pins

* Apply LCD fixes to Printrboard v1

From @cheton at #8347

And...   Keep both branches in synchronization.

http://3dtoday.ru/blogs/svs0724/ruramps4d-ramps-for-adruino-due-the-pilot-shipment-available-for-zack/

changed includes to make Arduino IDE happy

This reverts commit 6f70e5618e.

fix typo

re-write PWM section, add "not on Re-ARM" list

* if !HAS_MESH we still need to do some motion!

Thank You MagoKimbra !

* Ooops....   need #else and not #elif

LPC1768 VIKI2 & RRDFG are working

looks like all SPIs are working

library change

sh1106 locks up

fixed lockup, started I2C SW com

pretty

re-org

restore a few files

make library happy

switched HAL version of rrd

fix travis error

travis error fixes

another travis fix

cleanup

minor update

one more

correct spacing in platformio.ini

- Fix G26 Circle Drawing.
- Add default extrusion settings so machine can print lines on print bed
- Yet to be done: Get LCD Menu's to use these settings.

* fix M48 for delta printers

fix M48 for delta printers. home printer if not already homed.

* remove ENABLED(DELTA)

remove ENABLED(DELTA) as it is not needed.

* Update M48.cpp

* abl needs queue.h

without queue.h abl will not compile since there is a script that runs at the end of it and we need to queue it up.

Corresponding to #8306

[2.0] Add platformio support for stm32

This reverts commit 172c36f517.