Library refresh

v0.3

• Library rewrite to use http-request as the HTTP layer.
• Added the new methods from VT Public API v2.0: rescanFile(), getIpReport(), getDomainReport().
• Removed the deprecation of passing file paths to scanFile(). The form-data library takes care of the multipart/form-data requests, which is way more flexible.
• Removed the deprecated methods makeFileComment() and makeUrlComment().
• Unit testing.
• Documentation generated with JSDoc 3.