Squirrel/Squirrel.Mac — pull request #138 by inket (2014-12-13 17:13:25+00:00)
Title: Stop checking for updates after downloading one

Fixes #111

There's still the issue where a user who almost never restarts the app might get an 'old' update if several updates were released while the app is open. Ideally, we'd compare `pub_date`s to see if the downloaded update should be replaced with a new one.