Making a new release `v0.4.1`

Two patches added with the recent commits:

The CONUS scripts now have correct paths to deal with the coordinate variables and relevant NCL script, since the update of the directory structure of the package as of v0.4.0,
The cache directory now has a new path, and is also compatible with $SLURM_TMPDIR. The --cache has always been an optional argument for users, but if they want to use the high throughput capability of Graham nodes' SSD storages, they can assign --cache='$SLURM_TMPDIR'. For now, users MUST be mindful of single quotation marks around $SLURM_TMPDIR variable. This will become a more convenient option for users soon to avoid confusion.
The conus_ii has been retested (no changes in code implemented), and works efficiently with the SSD cache path.

Therefore, a new release is required for the patches applied and tests implemented.

CH-Earth / datatool