Isolate Storage for each platform

[co2-git]

transformed 449/466 (96%)(node:5217) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1011): UnableToResolveError: Unable to resolve module util from /Users/francois/Dev/Timer/node_modules/nedb/lib/datastore.js: Module does not exist in the module map or in these directories:
/Users/francois/Dev/Timer/node_modules/nedb/node_modules
, /Users/francois/Dev/Timer/node_modules
, /Users/francois/node_modules