Move data-parsoid into a JSON structure outside the DOM

 * IDs are generate with the following pattern,

     mw<base64-encoded counter>

 * Adds two flags to parse.js,

     --dp, Outputs the JSON structure

     --dpin <JSON>, Accepts the output from the above

 * Adds a configuration env.conf.parsoid.storeDataParsoid
   which is off by default to keep parserTests passing,
   but turned on with the above flags.

Bug: 52936
Change-Id: Ie58620d0909be3fcd3e9dcf84efaaa16c96d556e