thermistortables.h: Add comments that table 60 uses beta=3950.
fix bug in M200 with multiple extruders
Fixed M107 not turning off fan
fix bug for dual extruders not working

some guy find that marlin not working good for dual extruders delta .
when type T0 or T1 to active extruder and  E0 or E1  move causing XYZ
motion . so i locales the bugs and fix it , I have dry run the fix.
Merge pull request #864 from whosawhatsis/M200

fix bug in M200 with multiple extruders
Merge pull request #866 from sakunamary/Marlin_v1

fix bug for dual extruders not working
Merge pull request #860 from drf5n/therm3950

thermistortables.h: Add comments that table 60 uses beta=3950.
Merge branch 'Marlin_v1' into Schultzes
Merge branch 'FanKickstart' into Schultzes