Add Style Guide

Author: LKaemmerling

README.md

@@ -38,3 +38,8 @@ Usage example
 After the documentation has been created, click on `Usage` section
 
 Or open `docs/usage.rst`
+
+
+Style Guide
+-------------
+* **Type Hints**: If the type hint line is to long use inline hinting. Maximum inline type hint line should be 150 chars.