add more to release note
### Version 0.0.19 ###
-* Added optional param "label" for all vertices in Python (e.g. Gaussian(0., 1., label="gaussian"))
+* Added `get_vertex_by_label` to `BayesNet`
+* Added optional param `label` for all vertices in Python (e.g. `Gaussian(0., 1., label="gaussian")`)
* Added better Python operator overloading support.
- Includes automatically casting to the correct datatype where possible.
* Added Geometric Distribution vertex
