Post functionality

[fredrb]

• Use POST to Prefill request and export local code to codepen for testing/publishing.
• Provide a properties file with attributes like pre-processors and external code.

cpen init: Initialize codepen project

cpen post: Open pen in browser (this with data)

[gerkirill]

maybe it's also a good idea to update npm package ;)
https://www.npmjs.com/package/cpen