Upgrade gadget rendering server to latest. This will make Go trusts CA signed certificates by default when rendering a gadget from external server. And will make card activity gadget works when pointing to a Mingle SaaS instance (Which is currently broken because Mingle SaaS instance reponses involves different certificates from different services)
Merge pull request #271 from wpc/master

Make card activity gadget works with Mingle SaaS instances