now has <clean> command

ts/npmci.clean.ts

@@ -0,0 +1,13 @@
+import "typings-global";
+import * as plugins from "./npmci.plugins";
+import * as paths from "./npmci.paths"
+
+/**
+ * cleans npmci config files
+ */
+export let clean = () => {
+    let done = plugins.q.defer();
+    plugins.smartfile.fs.removeSync(paths.NpmciPackageConfig);
+    done.resolve();
+    return done.promise;
+};