More docs updates

README.md

@@ -12,8 +12,17 @@ pip3 install git+https://gitlab.nibio.no/VIPS/vipscore-python-common.git@v0.1.6
 ```
 ...where the version is specified after the `@`
 
+If you're implementing a VIPS model, typical imports would be
 
-## Unit tests
+``` python
+from vipscore_common.vips_model import VIPSModel
+from vipscore_common.entities import Result, ModelConfiguration, WeatherObservation
+from vipscore_common.data_utils import *
+```
+
+## Developer guide
+
+### Unit tests
 The tests are located in the `tests` folder, and we're using [Pytest](https://docs.pytest.org/)
 
 To run the unit tests, move to the root folder of the project, and execute:
@@ -22,5 +31,17 @@ To run the unit tests, move to the root folder of the project, and execute:
 pytest -v
 ```
 
-## References
+### Using bumpver
+For developers: When you want to publish a new version, use
+``` bash
+# Increment the PATCH version when you make backwards compatible bug fixes.
+bumpver update --patch
+# Increment the MINOR version when you add functionality in a backwards compatible manner.
+bumpver update --minor
+# Increment the MAJOR version when you make incompatible API changes.
+bumpver update --major
+```
+[(Source)](https://semver.org/#summary)
+
+### References
 We used this excellent guide for packaging: https://realpython.com/pypi-publish-python-package/ 
\ No newline at end of file