implement preheat and cooldown
add config for the preheat values
comment out yet to be implented menu items
add default preheat config entries to config sample
Merge pull request #184 from wolfmanjm/update/panel

Update/panel
Fix watch screen update when file played from console
Only display filename part on LCD when play from LCD
Merge pull request #185 from wolfmanjm/fix/panel-play

Fix watch screen update when file played from console
allow for watchscreen to handle temperature being disabled.
Merge pull request #186 from wolfmanjm/upstreamedge

allow for watchscreen to handle temperature being disabled.
Fix get_checksum to take a const char* as well as string so Debug mode doesn't barf
Merge pull request #187 from wolfmanjm/fix/get_checksum

Fix get_checksum to take a const char* as well as string so Debug mode d...
Add Extruder screen to panel
Merge pull request #188 from wolfmanjm/add/extruder-screen

Add Extruder screen to panel
Update TemperatureControl.cpp

Add mark as taken for M105
Show paused status if paused
Merge pull request #190 from wolfmanjm/add/panel-pause-status

Show paused status if paused
Fix M17/M18/M84
Merge pull request #191 from wolfmanjm/fix/m17-m18

Fix M17/M18/M84
Merge remote-tracking branch 'upstream/edge' into scissor-lift-hbot