Cqml

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- do_calc (multiple columns)
- operator vs function
- save: ['grid'] using csv preview
- BOX support (require boxsdk)
- CHANGE: distinct by default
- CHANGE: sort by default

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- Support Unions

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- Report always appends; daily just does table
- Use non-debug-named README.md
- TODO: New QUILT grids: https://github.com/quiltdata/quilt/blob/master/docs/Catalog/VisualizationDashboards.md [change SAVE behavior]
- TODO: Store GitHub Commit (hash? URL?)
- TODO: Rename Right Join Key
- TODO: Use 'on' versus first col (v0.4.0)
- TODO: clean out old files from Quilt packages

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- yml_keys
- smart report on daily
- ymm env

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- ANY clause
- fix cvm2pkg / pkg_all

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- matching
- cqml_test_db
- ymm db
- cleanup yaml