catalyst: remove obsolete scripts
catalyst: add an exploration module
catalyst: use the exploration module in mpas-insitu
catalyst: update a comment
catalyst: just use a basic view rather than a full view
catalyst: simplify the exporters more

Now grid exporting is much more similar to the explorer exporting.
catalyst: move frequency to the top-level
catalyst: improve an error message
catalyst: add missing commas
catalyst: clean up the colorby3d example
catalyst: add more examples
catalyst: set the active source before creating filters
catalyst: add missing itertools import
catalyst: more list -> tuple changes
catalyst: hook up finalization

This allows the analysis manager to know when to write its data.
catalyst: use a plain Surface representation
catalyst: use xyz-nlayer
catalyst: clean up the insitu example

This cleans up the pipeline configurations to remove excess data
resulting from copy/paste of the pipelines.
catalyst: remove isolines example pipeline
catalyst: un hard-code temperature