Merge pull request #70 from hailinyan/master

change compile environment for ACCESS-CM2 on nci platform
Updated NCI mkmf template
mpifort bin name update
Revert MOM_compile defaults
Merge pull request #71 from marshallward/ncibuild

Ncibuild
Use -xHost on NCI with optimised build.
Merge pull request #72 from nicholash/perf-xhost

Use -xHost on NCI with optimised build.
update compile environs.access-cm2 to use openmpi/1.8.2