Changed the way epslevel is updated in diff to match that of chebtech.
Removed the 2/3 penalty in classicCheck also to match chebtechs classicCheck.
Merge remote-tracking branch 'origin' into fix-fourtech-epslevel
Updated to check for ambiguity in determining the min of a complex valued fourtech.
Merge remote-tracking branch 'chebfun/fix-fourtech-epslevel' into development