Add support for dbt values as well as functions

Merge remote-tracking branch 'origin/master'

Use collect-dbt-contexts.py to pull documentation from dbt

Update README.md

Add demo gif

Add demo gif

Add intention for documenting macros and parameters

Automatically detect if DBT needs upgrading

No longer rely on "schema.yml" as the name for resource props

Initial (partial) implementation of documentation

Support macro go-to def, completion, and parameter info

Fix all lint issues

Improve completion and add param list info support

Add support for ref and source

Merge remote-tracking branch 'origin/master'