Update tutorial4.ino
Merge pull request #1 from joshualewis1992/master

Update Jayson
Create PreheatSoak.ino
Update PreheatSoak.ino
Update and rename PreheatSoak.ino to Reflow.ino
Merge pull request #2 from hfried432/master

merger
Update Reflow.ino
Rename Reflow.ino to ReflowSlope.ino
Create ReflowTime.ino
Merge pull request #3 from hfried432/master

merger2
Merge pull request #3 from jig2/master

merged