v1.1.4

Summary

This is release features minor changes, with performance improvements, and bugfixes;

Changes:

• implicit Z diffusion made considerably more efficient. For optimal performance, the code needs to be built with -D_DECOMP_Z, as explained in README.md;
• new example files and grid mapping functions have been added (thanks @GabrieleBoga for the temporal boundary layer setup! #22);
• other minor bugfixes;