Clarify what library and location of dropzone.js

This instruction was terribly confusing:

{code}Step 1: Download libraries from http://www.dropzonejs.com/ and push it in: site/all/libraries/dropzonejs{code}

'sites/all/libraries' is a D7 convention, not D8. In addition, it was not clear that I need the full library, not simply the js linked on the dropzone website. It was not until I looked at the patch for 'warning when JS library is not available' that I realized the problem. Here are suggested changes for the documentation:

Step 1: Download the libraries from http://www.dropzonejs.com/.

• You need the full library which is easily available from the github repo: https://github.com/enyo/dropzone/tree/master/dist
• Install the library folder in /your-drupal-docroot/libraries/
• The full path to the required js file should be: /your-drupal-docroot/libraries/dropzone/dist/dropzone.js