remove zettelgeist.com - using Wiki for everything

Author: George K. Thiruvathukal

README.md

@@ -4,10 +4,7 @@
 
 # Overview
 
-ZettelGeist is a plaintext notetaking system inspired by the Zettelkasten approach. As this README is intended to be minimal,
-we encourage you to visit http://zettelgeist.com for additional details.
-
-# Getting Started
+ZettelGeist is a plaintext notetaking system inspired by the Zettelkasten approach.
 
 Please see the [ZettelGeist Wiki](https://github.com/ZettelGeist/zettelgeist/wiki) for detailed installation and usage instructions.