add Concat options

Create new NS Annotation: `@ns.concat` its a array options with all libs path, example:

``` javascript
/**
  * @ns.concat: 'my-libs1.js', 'other-lib2.js'
  * @ns.alias: 'opa'
  */
```

**output - after execute `nsify`**

``` javascript
var myLib1  = (functions ...);
var otherLib2  = (functions ...);
var opa  = (functions ...);
```
