Add notes about updating the pipfile and requirements
MODIFY
Pipfile
Pipfile
+# Note that there is a devrequirements.txt file in this project, if you are
+# updating this Pipfile make sure to update the devrequirements.txt accordingly
+
[dev-packages]
-pyyaml="*"
pytest="*"
wheel="*"
pytest-cov="*"
+PyYAML = "*"
+recommonmark = "*"
+alabaster = "*"
+Sphinx = ">=1.4,!=1.5.4"
+alabaster_jupyterhub = "*"
[packages]
repo2docker = {path=".", editable=true}

MODIFY
dev-requirements.txt
dev-requirements.txt
-pyyaml
+# Note that there is also a Pipfile for this project if you are updating this
+# file do not forget to update thr Pipfile accordingly
pytest
wheel
pytest-cov

Add notes about updating the pipfile and requirements