* Moved `source.Files` to its own package, thus the type is now `files.Files`.
* Moved much of the location functionality from pkg `source` to its own package `location`.
* CSV now renames duplicate ingest headers
* Fix broken test
* xlsx ingester now handles duplicate col names
* Update CHANGELOG
* Additional tests for ingest.column.rename
* Removed dead comment in grammar
* Moved time functions from pkg stringz to pkg timez
* Refactor options.Opt
* wip: initial work on configurable time layout
* wip: most printers now respect format.datetime and friends
* Folded pkg timefmt into timez
* Refactor options.Opt; refine options
* Add 'sq config set OPTION --help' mechanism
* Finished completion of OptDateFormatAsNumber and OptTimeFormatAsNumber
* CHANGELOG text clarification
* Dialing in config/options
* Yet more dialing in of config/options
* Refactor output writers
* YAML output for more commands
* refactor: partially moved over driver.Tuning params to options
* All knobs moved to options
* sq config edit: now has comments for options
* Major work complete on config/options overhaul
* Major work complete on config/options overhaul
* Updated help text for 'sq version'
* refactor: moved cli flags to pkg cli/flag
* testh: add OptLongDB for long-running tests
* implement 'sq config dir'
* legacy dir migration: probably a bad idea
* cleanup
* Refactored SQ_CONFIG and --config
* added yaml writer
* Dialing in tests
* YAML output for 'sq driver ls'
* Significant refactoring of config
* Minor test for ioz
* Rename source.Set to source.Collection
* Cleaning up references to source.Set
* Clean up misc text
* config: will repair itself if active source is corrupted
* Clean up error handling code
* CHANGELOG update
* Update config tests to allow invalid active source
* Type Detector refactor
* json driver impl; refactoring of source.Files reader et al
* working on kind detector
* significant switcheroo of packages
* partway throught refactoring Kind
* major package switcheroo for Kind
