- switch control of debug print from debugLevel to debugMode. - remove unused variables ; indent code ; fix GLOBAL_SUM calls.
- switch control of debug print from debugLevel to debugMode.
- remove unused variables ; indent code ; fix GLOBAL_SUM calls.

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h