Property definitions

nitc :: nitpackage $ MPackage :: homepage_url
	private var homepage_url: nullable String is lazy do
		var git = git_url
		if git == null then return null
		# Special case for nit files
		if git.has_suffix("/nit.git") then
			return "http://nitlanguage.org"
		end
		return git.replace(".git", "")
	end
src/nitpackage.nit:201,2--209,4