MG2 kernel

For general information about MG2 kernel, please read README in https://subversion.ucar.edu/pubasap/kernels/MG2.

This version of MG2 is generated from rev. 69541 of https://svn-ccsm-models.cgd.ucar.edu/cam1/trunk_tags/cam5_3_74 using PGI compiler.

Please contact Youngsung Kim(youngsun@ucar.edu) for any questions concerning this kernel.
