message: Update README.md
  Remove bad practices of sudo pip and install use safer pip install commands
diff: @@ -7,8 +7,8 @@ See the [Quickstart tutorial](https://www.tensorflow.org/get_started/estimator)
  for an introduction to the API.
  To run most of these examples, you need to install the `scikit learn` library
  -(`sudo pip install sklearn`). Some examples use the `pandas` library for data
  -processing (`sudo pip install pandas`).
  +(`pip install -U scikit-learn`). Some examples use the `pandas` library for data
  +processing (`pip install -U pandas`).
  ## Basics
  