Restore the python/pip.bzl#pip_repositories function

It is called from rules_docker so we have to leave a placeholder until rules_docker is fixed and all users update

examples/legacy_pip_import/README.md

diff --git a/examples/legacy_pip_import/README.md b/examples/legacy_pip_import/README.md
index 8ce8438..a474a01 100644
--- a/examples/legacy_pip_import/README.md
+++ b/examples/legacy_pip_import/README.md
@@ -1,6 +1,6 @@
 # LEGACY pip example
 
-This feature has been replaced by the pip_install rule, please see the latest release notes to migrate.
+This feature has been replaced by the pip_install rule, please see the rules_python 0.1 release notes to migrate.
 
 This shows how you can point Bazel at your requirements.txt file to get dependencies automatically installed.
 

python/legacy_pip_import/pip.bzl

diff --git a/python/legacy_pip_import/pip.bzl b/python/legacy_pip_import/pip.bzl
index ff7977b..bc493b8 100644
--- a/python/legacy_pip_import/pip.bzl
+++ b/python/legacy_pip_import/pip.bzl
@@ -140,4 +140,4 @@
 
 def pip_repositories():
     # buildifier: disable=print
-    print("DEPRECATED: the pip_import rule has been replaced with pip_install, please see release notes")
+    print("DEPRECATED: the pip_import rule has been replaced with pip_install, please see rules_python 0.1 release notes")

python/pip.bzl

diff --git a/python/pip.bzl b/python/pip.bzl
index 6a0bcb9..44e4167 100644
--- a/python/pip.bzl
+++ b/python/pip.bzl
@@ -56,8 +56,12 @@
         **kwargs
     )
 
+def pip_repositories():
+    # buildifier: disable=print
+    print("DEPRECATED: the pip_repositories rule has been replaced with pip_install, please see rules_python 0.1 release notes")
+
 def pip_import(**kwargs):
     fail("=" * 79 + """\n
-    pip_import has been replaced with pip_install, please see the release notes.
+    pip_import has been replaced with pip_install, please see the rules_python 0.1 release notes.
     To continue using it, you can load from "@rules_python//python/legacy_pip_import:pip.bzl"
     """)