compatible with 2016.05.26

Ulm release (21.0.0)

Ulm prerelease (21.0.0-beta)

Allow thickness to be transported with SIS tracer advection scheme

- Utilizes the SIS tracer advection kernels to transport thickness.
- NOTE: UPWIND_2D is not implemented but resorted to PCM multi-dimensional.
- No answer changes due to defaults.

Allow thickness to be transported with SIS tracer advection scheme

- Utilizes the SIS tracer advection kernels to transport thickness.
- NOTE: UPWIND_2D is not implemented but resorted to PCM multi-dimensional.
- No answer changes due to defaults.

Allow thickness to be transported with SIS tracer advection scheme

- Utilizes the SIS tracer advection kernels to transport thickness.
- NOTE: UPWIND_2D is not implemented but resorted to PCM multi-dimensional.
- No answer changes due to defaults.

Patch to hide "bad lon" messages when using maskmap

- Using a mask_table to mask out processors necessarily means that
  some geographic coordinate data is not known in all halo-regions.
- The iceberg code scans the geographic coordinate data and reports
  points that have "suspect" values. Using a mask_table caused a
  lot of messages to be written.
- I've disable this sanity check when a mask_table is being used.
- No answer changes.

First draft of SIS2 to be evaluated in OM4/CM4 configuration.