UGRID into contrib-4.3

Not sure how we should handle the external library dependency. I don't have the UGRID in any Maven repository. Let me know if you want me to take that route.

For now, you can clone the UGRID library repository and manually add the JAR to your local Maven (similar to what you must do for NcWMS). I added the JAR to the git repository so you don't have to deal with the circular dependencies between the projects.

https://github.com/asascience-open/NetCDF-Java-UGRID