Vega test case and stub file.
Further stubbing for vega.
More vega examples.
Arc example.
WIP: Vega emitter hacky stages.
WIP: Vega emit; added test infrastructure.
Merge branch 'Cardenio' into Cardenio-Vega
Closed off stencil form.
Modified string-template call wrapper.
Merge branch 'Cardenio' into Cardenio-Vega
Split apart emit tests.
Improved error reporting in auto-bind generation.
WIP: Progress...
Merge branch 'Cardenio' into Cardenio-Vega
Guide treatment working
Replaced (complement =) with not=
WIP: Converting from stencil to dictionaries.
First vega-emit goes all the way through (not complete coverage...yet)
Emit scales working.
Domain emit fixed.  Simplified pod emitter.