Adds save functionality and fixes missing require issue with
persistence in NodeJS server.  Updates package.json and
npm-shrinkwrap.json to include new querystring package for handling
POST param parsing.

References #2897.
Merge branch 'development' into branch/nodejs-basicsave
Merge pull request #52 from virtual-world-framework/branch/nodejs-basicsave

Save/Load Fixes for Existing NodeJS Persistence Implementation