Priyansh Gaharana issues

Results 2 issues of


                                            Priyansh Gaharana

![screenshot 32](https://user-images.githubusercontent.com/34992117/37863932-d32773be-2f8c-11e8-824f-7bc51cce7cf8.png)

- Adds feature for prepend in node-plop - Updated readme for prepend - Adds test for the use cases of prepend