docs: update README to reflect repository move (#454)

Author: tswast

README.rst

@@ -1,10 +1,21 @@
 pandas-gbq
 ==========
 
-|Build Status| |Version Status| |Coverage Status| |Black Formatted|
+|preview| |pypi| |versions| 
 
-**pandas-gbq** is a package providing an interface to the Google BigQuery API from pandas
+**pandas-gbq** is a package providing an interface to the Google BigQuery API from pandas.
 
+-  `Library Documentation`_
+-  `Product Documentation`_
+
+.. |preview| image:: https://img.shields.io/badge/support-preview-orange.svg
+   :target: https://github.com/googleapis/google-cloud-python/blob/main/README.rst#beta-support
+.. |pypi| image:: https://img.shields.io/pypi/v/pandas-gbq.svg
+   :target: https://pypi.org/project/pandas-gbq/
+.. |versions| image:: https://img.shields.io/pypi/pyversions/pandas-gbq.svg
+   :target: https://pypi.org/project/pandas-gbq/
+.. _Library Documentation: https://googleapis.dev/python/pandas-gbq/latest/
+.. _Product Documentation: https://cloud.google.com/bigquery/docs/reference/v2/
 
 Installation
 ------------
@@ -29,19 +40,31 @@ Install latest development version
 
 .. code-block:: shell
 
-    $ pip install git+https://github.com/pydata/pandas-gbq.git
+    $ pip install git+https://github.com/googleapis/python-bigquery-pandas.git
 
 
 Usage
 -----
 
-See the `pandas-gbq documentation <https://pandas-gbq.readthedocs.io/>`_ for more details.
+Perform a query
+~~~~~~~~~~~~~~~
+
+.. code:: python
+
+    import pandas_gbq
+    
+    result_dataframe = pandas_gbq.read_gbq("SELECT column FROM dataset.table WHERE value = 'something'")
+
+Upload a dataframe
+~~~~~~~~~~~~~~~~~~
+
+.. code:: python
+
+    import pandas_gbq
+    
+    pandas_gbq.to_gbq(dataframe, "dataset.table")
+
+More samples
+~~~~~~~~~~~~
 
-.. |Build Status| image:: https://circleci.com/gh/pydata/pandas-gbq/tree/master.svg?style=svg
-   :target: https://circleci.com/gh/pydata/pandas-gbq/tree/master
-.. |Version Status| image:: https://img.shields.io/pypi/v/pandas-gbq.svg
-   :target: https://pypi.python.org/pypi/pandas-gbq/
-.. |Coverage Status| image:: https://img.shields.io/codecov/c/github/pydata/pandas-gbq.svg
-   :target: https://codecov.io/gh/pydata/pandas-gbq/
-.. |Black Formatted| image:: https://img.shields.io/badge/code%20style-black-000000.svg
-   :target: https://github.com/ambv/black
+See the `pandas-gbq documentation <https://googleapis.dev/python/pandas-gbq/latest/>`_ for more details.