Added git flow project to the git-flow help message

git-flow

@@ -54,6 +54,7 @@ usage() {
 	echo
 	echo "Available subcommands are:"
 	echo "   init      Initialize a new git repo with support for the branching model."
+	echo "   project   Manage your project branches."
 	echo "   feature   Manage your feature branches."
 	echo "   release   Manage your release branches."
 	echo "   hotfix    Manage your hotfix branches."