Enhanced README and added CHANGELOG

Author: maximilionus

CHANGELOG.md

@@ -0,0 +1,4 @@
+# Python Docs - Dark Theme: Changelog
+
+## **1.0.0** - 2020.10.22
+- First release of this `usercss` theme

README.md

@@ -3,7 +3,8 @@
     Dark Theme
 </h1>
 <h2 align="center">
-    📦 <a href="https://github.com/maximilionus/python_docs_dark/raw/master/python_docs_dark.user.css">INSTALL</a>
+    <div>📦 <a href="https://github.com/maximilionus/python_docs_dark/raw/master/python_docs_dark.user.css">INSTALL</a> 📦</div>
+    <div><code>.user.css</code></div>
 </h2>
 <br><br>