v0.4.1

What's Changed

• Superset install by @EJOOSTEROP in #17
• Update master with latest release by @EJOOSTEROP in #18
• readme: Pull docker from GitHub by @EJOOSTEROP in #19
• Documentation update by @EJOOSTEROP in #20
• Documentation only. Minor edits by @EJOOSTEROP in #21
• Documentation updates by @EJOOSTEROP in #22
• test_update branch was screwed somehow by @EJOOSTEROP in #23
• Test update by @EJOOSTEROP in #25

Full Changelog: v0.3.0...v0.4.1