~mil/mobroute

Bump mobsql dep: fix for custom GTFS feeds 'active' status
Bump version to v0.9.0
Bump mobsql dep to v0.9.0
Regenerate CLI doc
Add databaseq example to CLI userguide; minor various other doc fixups
Minor doc cleanups
Bulk doc cleanup
Fix stops CLI subcommand; nil filtering was broken as not behavior of loader

Add support for filtering nils in dbquery.LoadStopWalks
Bulk godoc updates
Fix query for stop walks extraction limiting based on dist_km filter
Godoc QA fixes
Regenerate CLI doc
Misc go docs update
Bulk godoc cleanup
Cleanup godoc & examples
Link to diagrams from godoc
Add routing dataflow pattern diagram
Rework & fill out most of the remaning godoc
Fix doc SVG diagrams rendering
Add overal system diagram to doc
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