Add 0.3.4 release notes [skip ci]
### Added
+## [0.3.4](https://github.com/MarquezProject/marquez/releases/tag/0.3.4) - 2019-05-17
+
+### Changed
+
+* Change `Datasetdao.findAll()` to order by `Dataset.name`
+
## [0.3.3](https://github.com/MarquezProject/marquez/releases/tag/0.3.3) - 2019-05-14
### Changed
