Added alias 'co' for new 'checkout' subcommand.
diff --git a/git-flow-feature b/git-flow-feature
index 56dd38d..98154ef 100644
--- a/git-flow-feature
+++ b/git-flow-feature
@@ -401,6 +401,11 @@
 	fi
 }
 
+cmd_co() {
+	# Alias for checkout
+	cmd_checkout "$@"
+}
+
 cmd_rebase() {
 	DEFINE_boolean interactive false 'do an interactive rebase' i
 	parse_args "$@"