Add AgnosterZak oh-my-zsh theme including Battery life info & very rich git status info

External-themes.md

@@ -177,3 +177,21 @@ author: [@denysdovhan](https://github.com/denysdovhan)
 
 source: [here](https://github.com/radmonac/zeta-zsh-theme)
 author: [@radmonac](https://github.com/radmonac)
+
+#### AgnosterZak
+
+![AgnosterZak theme](https://raw.githubusercontent.com/zakaziko99/agnosterzak-ohmyzsh-theme/master/images/agnosterzak-01.png)
+
+AgnosterZak is a oh-my-zsh shell theme based on the Powerline Vim plugin & Agnoster Theme.
+
+It currently shows:
+
+- Battery Life (in case of the laptop is not charging)
+- Current Date & Time
+- Current directory
+- Git status
+- User & Host status
+
+See [Repo](https://github.com/zakaziko99/agnosterzak-ohmyzsh-theme) for source
+
+author: [@zakaziko99](https://github.com/zakaziko99)