Getting an API set up from GitHub

I've set up my github account and I'm ready to go. I'm trying to follow these instructions, for setting up an API wrapper for an iPhone project using Soundcloud, but I'm a bit lost:

 1. Go to your project directory.
 2. Add the Cocoa API Wrapper as a Git Subproject

    git submodule add git://github.com/soundcloud/cocoa-api-wrapper.git SoundCloudAPI

 3. Update the Subprojects (the API Wrapper includes the NXOAuth2Framework as a subproject)

    git submodule update --init --recursive

My questions are: Where do I go in my project directory? The same level as the XCode 开发者_如何学Pythonproject file? Also, the command in #2 doesn't really work for me. I get the error:

 fatal: Not a git repository (or any of the parent directories): .git

Am I missing something?

These instructions assume that you're using git for your project. And according to the error message, you don't. So, probably, you want at least to git init your project, but probably you will want more.

As for where to go in your project — where you want the SoundCloudAPI to reside. Which will be created in the current directory.