Important: The repositories organizer does not appear in Xcode 5. In Xcode 5, source control management tasks are performed in the Source Control menu and the Accounts preferences.
Adding Files to a New Subversion Directory
Add nonproject files to a repository folder created with the repositories organizer.
In the repositories organizer, select the folder to which the files will be added.
Click the Import button at the lower right corner of the window.
Locate and select the desired file or folder.
Enter a commit message and click Import.
The video shows adding the file
The repositories organizer supports creating a folder in a subversion repository for maintaining and administering the repository. For example, you might want to include documents that provide details for a specific branch or that specify any deviations from your organization’s branching and merging protocols. To add folders and files to a project, use the project navigator in the workspace window.