Add sideband control PTY for FS and reset lines (#374)

* Add sideband control PTY for FS and reset lines

* Add sideband test coverage for MMU2

Fix #355 - semicolons/blank lines in hex file

Fix heater freeze on power loss/reset (#353)

Assorted cleaning (#332)

* Merge/cleanup USBIP part 1

* Fix clang-tidy and cleanup errors

* Cleaning & washing of code

Update help text to remove outdated info

Fixes #317

Add "debugcore" option for more flash space on 2560 (#304)

* Add debugchip option for more flash space on 2560

Fix #291 Factory reset (#292)

* Fix #291

* fix makefile for OSX

#272 - Scripting Input terminal (#273)

* Basic input terminal (#272) with tab-complete

* Try to force a single task for tests

#239-Filament presence on startup (#240)

* #239-Filament presence on startup

* Update tests

#230 expand testing (#231)

* add a GL testing helper
* add GL test functionality, extensive tests
* Fix #236