Update contributing guidelines

Author: timvink

CONTRIBUTING.md

@@ -38,4 +38,15 @@ They need to be deployed manually:
 
 ```bash
 mkdocs gh-deploy --force
-```
+```
+
+## Release
+
+Update `setup.py`.
+
+```bash
+git tag <version>
+git push origin <version>
+```
+
+Then manually create a github release to trigger publishing to pypi.

Makefile

@@ -0,0 +1,11 @@
+
+setup:
+	pip install -r tests/test_requirements.txt
+	pip install -e .
+
+test:
+	pyflakes tests/ mkdocs_table_reader_plugin/
+	pytest --cov=mkdocs_table_reader_plugin --cov-report term-missing tests
+
+deploy_docs:
+	mkdocs gh-deploy --force

tests/test_requirements.txt

@@ -4,6 +4,8 @@ codecov
 click
 xlrd>=1.0.0
 openpyxl
+# linting
+pyflakes
 # documentation
 mkdocs-material
 mkdocs-markdownextradata-plugin