Add dependency on a github project that doesn't support Composer.

composer.json

{
	"name": "my-github-username/my-project-name",
	"description": "Project description goes here",

	"repositories": {
		"other-github-username/other-github-project-name": {
			"type": "package",
			"package": {
				"name": "other-github-username/other-github-project-name",
				"version": "dev-master",
				"source": {
					"url": "git://github.com/other-github-username/other-github-project-name.git",
					"type": "git",
					"reference": "master"
				},
				"autoload": {
					"classmap": ["lib/"]
				}
			}
		}
	},

	"require": {
		"php": ">=5.3.4",
		"other-github-username/other-github-project-name": "dev-master"
	},
}