DO THE FOLLOWING COMMANDS AFTER PULLING THIS COMMIT:
```
git submodule update --remote extern/SDL
git submodule update --remote extern/imgui
```
OTHERWISE THINGS MAY BREAK
* 'master' of https://github.com/tildearrow/furnace: (70 commits)
whoops
GUI: AY8930 credits
GUI: fix inability to close subsongs
BANK
OPN: wire up ExtCh system
fix build failure
dev95 - multiple songs in a single file (READ)
DO NOT USE - THIS FAILS - WORK IN PROGRESS
enforce asset limits
old .dmf loading improvements
add AICA and YMZ ADPCM formats
allocate ID for YMZ280B
harden .fur file saver
Fix AY VGM output, Fix presets
preparations for UI improvements
GUI: add more presets
prepare for ExtCh OPN/OPNA
GUI: clarify that lock layout doesn't work yet
GUI: remember last state of order edit mode
GUI: store edit/followOrders/followPattern state
...
# Conflicts:
# src/engine/fileOps.cpp
# src/engine/platform/ym2610.cpp
# src/engine/platform/ym2610b.cpp
# src/engine/sample.cpp
# src/engine/sample.h
# src/engine/sysDef.cpp
# src/gui/doAction.cpp
# src/gui/sysConf.cpp
* 'master' of https://github.com/tildearrow/furnace:
full linear pitch is now the default
add a full linear pitch mode, part 7
X1-010: implement linear pitch (part 6)
VERA: implement full linear pitch (part 5)
YM2610(B): implement full linear pitch (part 4)
add a full linear pitch mode, part 3
YM2612: implement full linear pitch (part 2)
update readme
re-enable warnings are errors on MSVC
YM2612: early full linear pitch experiment
GUI: window movement only by clicking on title bar
Fix GCC errors 2
Fix GCC errors
Remove SCC from TODO.md
SCC has no config flags currently
Add SCC and SCC+ support
# Conflicts:
# CMakeLists.txt
# src/engine/dispatchContainer.cpp
# src/gui/guiConst.cpp
