update readme with warning

Author: ardunn

README.md

@@ -8,10 +8,10 @@ automatminer is an automatic prediction engine for materials properties.
 | [![CircleCI](https://img.shields.io/circleci/project/github/hackingmaterials/automatminer/master.svg)](https://circleci.com/gh/hackingmaterials/automatminer) | [![Codacy Badge](https://img.shields.io/codacy/coverage/aa63dd7aa85e480bbe0e924a02ad1540.svg?colorB=brightgreen)](https://www.codacy.com/app/ardunn/automatminer) | [![Codacy Badge](https://img.shields.io/codacy/grade/aa63dd7aa85e480bbe0e924a02ad1540.svg)](https://www.codacy.com/app/ardunn/automatminer) | [![PyPI version](https://img.shields.io/pypi/v/automatminer.svg?colorB=blue)](https://pypi.org/project/automatminer/) |
 
 
-#### Warning: Automatminer is currently at an experimental stage of development.
-##### Please use in production at your own risk. 
+### Warning: Automatminer is currently at an experimental stage of development.
+#### Please use in production at your own risk. 
 Note: As of this writing, automatminer requires the newest version of [matminer (from GitHub)](https://github.com/hackingmaterials/matminer) to work properly. 
 
-- **Website (including documentation):** <https://hackingmaterials.github.io/automatminer>
+- **Website (including work-in-progress documentation):** <https://hackingmaterials.github.io/automatminer>
 - **Help/Support:** <https://groups.google.com/forum/#!forum/matminer>
 - **Source:** <https://github.com/hackingmaterials/automatminer>