Adds .readthedocs.yaml file for new ReadTheDocs builds. (#159)

* Add .readthedocs.yaml file and correct tile for tutorials

* Also add documentation badge

* Move build documentation badge

Co-authored-by: Kristin Berry <kberry@gyro.wr.usgs.gov>

.readthedocs.yaml

+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: docs/conf.py
+
+# Optionally build your docs in additional formats such as PDF
+formats:
+   - pdf
+
+conda:
+  environment: environment.yml
+

README.md

@@ -10,6 +10,8 @@ Current build status
 [![OSX](https://img.shields.io/travis/conda-forge/plio-feedstock/master.svg?label=macOS)](https://travis-ci.org/conda-forge/plio-feedstock)
 [![Windows](https://img.shields.io/appveyor/ci/conda-forge/plio-feedstock/master.svg?label=Windows)](https://ci.appveyor.com/project/conda-forge/plio-feedstock/branch/master)
 
+[![Documentation Status](https://readthedocs.org/projects/plio/badge/?version=latest)](https://plio.readthedocs.io/en/latest/?badge=latest)
+
 Current release info
 ====================
 
@@ -47,6 +49,7 @@ We maintain a development branch of plio that is used as a staging area for our
 
 [![Coverage Status](https://coveralls.io/repos/github/USGS-Astrogeology/plio/badge.svg?branch=master)](https://coveralls.io/github/USGS-Astrogeology/plio?branch=master)
 
+
 To install the development version: 
 
 ```

docs/users/tutorials/index.rst

-Getting Started with AutoCNet
-=============================
+Getting Started with Plio
+=========================
 
 .. toctree::
    :maxdepth: 1