Updated the Embedded Framework documentation to include `git init` info.

README.md

@@ -94,7 +94,13 @@ If you prefer not to use either of the aforementioned dependency managers, you c
 
 #### Embedded Framework
 
-- Add Alamofire as a [submodule](http://git-scm.com/docs/git-submodule) by opening the Terminal, `cd`-ing into your top-level project directory, and entering the following command:
+- Open up Terminal, `cd` into your top-level project directory, and run the following command "if" your project is not initialized as a git repository:
+
+```bash
+$ git init
+```
+
+- Add Alamofire as a git [submodule](http://git-scm.com/docs/git-submodule) by running the following command:
 
 ```bash
 $ git submodule add https://github.com/Alamofire/Alamofire.git