Switching arg parsing to yargs
Switching arg parsing to yargs

* Included yargs library
* Used to get name for create task
* Used to get fix flag for lint

camelburrito/amp-by-example,ampproject/amp-by-example,ampproject/amp-by-example,camelburrito/amp-by-example,ampproject/amp-by-example,ampproject/amp-by-example,camelburrito/amp-by-example,camelburrito/amp-by-example