What's Changed
* Fixes docs links to not have .html by skrawcz in https://github.com/DAGWorks-Inc/burr/pull/81
* Adds storage note to README by skrawcz in https://github.com/DAGWorks-Inc/burr/pull/80
* Update install.rst by elijahbenizzy in https://github.com/DAGWorks-Inc/burr/pull/84
* Removes links to slack by skrawcz in https://github.com/DAGWorks-Inc/burr/pull/83
* Repo hygiene by elijahbenizzy in https://github.com/DAGWorks-Inc/burr/pull/85
* Adds video to docs page by skrawcz in https://github.com/DAGWorks-Inc/burr/pull/86
* Adds postgresql persister by skrawcz in https://github.com/DAGWorks-Inc/burr/pull/87
* Version bump 0.9.0 by elijahbenizzy in https://github.com/DAGWorks-Inc/burr/pull/90
**Full Changelog**: https://github.com/DAGWorks-Inc/burr/compare/burr-0.8.1...burr-0.9.0