plugins/embedsrc.js: Add Pinterest Pin.
plugins/embedsrc.js: Improve use of IFRAME element.
Merge pull request #47 from watagashi/embedsrc

plugins/embedsrc.js: Add Pinterest Pin.
deserializeCookies: convert null -> ""
lists.js: Support <user>/lists/<listname> format url from lists.json API
stream.js: disconnect when no response from gateway