v0.7.6

• New Validation Renderer! Supports turning validation results into HTML and displays differences between the expected and the observed attributes of a dataset.
• Data Documentation sites are now fully configurable; a data context can be configured to generate multiple
  sites built with different GE objects to support a variety of data documentation use cases. See data documentation guide for more detail.
• CLI now has a new top-level command, build-documentation that can support rendering documentation for specified sites and even named data assets in a specific site.
• Introduced DotDict and LooselyTypedDotDict classes that allow to enforce typing of dictionaries.
• Bug fixes: improved internal logic of rendering data documentation, slack notification, and CLI profile command when datasource argument was not provided.