* Add churn prediction code to PSO repo

* Small fixes to scripts so they can be run from main directory

* Slight formatting fixes

* remove virtual environment directory

* Convert preproessing code to be Python 3 compliant

* Add information about dataset to README.md

* Remove virtualenv directory

* Add cloudml-churn-prediction description to main README.md

* update virtualenv info on README.md

* Fix typos

* Fix function names to align with style guide

* Fix parser syntax

* Switch to idiomatic dict comprehension

* Build Beam pipeline in helper function

* Add extra line after docstring

* Fix linter errors.

* fix style of get_query fn name

* Add unittesting

* Fix typo in TensorBoard instructions