v0.3.3

• PR #983: doc: fix nav bar
• PR #982: fix: batch merge causing redundant row
• PR #981: fix: use the same interface
• PR #979: docs: added logo
• PR #980: docs: Update README.md
• PR #975: Simplify the ludwig dependency
• PR #972: feat: improve dev doc
• PR #971: Revert "feat: Integrating thirdy party Slack API "
• PR #967: feat: Integrating thirdy party Slack API
• PR #966: Developer guide for new structure data source integration
• PR #949: feat: improve circle ci
• PR #946: Support `SELECT Func
• PR #963: Bump v0.3.3+dev
• PR #962: release 0.3.2