2.0.0-master_20170202

• numerous fixes to the EUS module.
• new rfswitch module
• new Cron module
• HTTP module can now chain requests
• new WPS module, #1694
• rework support for modules with >4MB flash chips
• new node.random function
• rewrite of net module on top of lwIP, breaking changes to UDP handling (#1080 (comment)), close() doesn't trigger disconnection event any more (#1716)

See the milestone for the full list of changes.