Merge pull request #1424 from metabase/heroku_deploy_fix

Don't use private/SSH remotes (e.x. git@github.com) because they brea…

.gitmodules

+# don't use private/SSH remotes (e.x. git@github.com) because they break Heroku deploys
 [submodule "OSX/Vendor/INAppStoreWindow"]
 	path = OSX/Vendor/INAppStoreWindow
-	url = git@github.com:indragiek/INAppStoreWindow.git
+	url = https://github.com/indragiek/INAppStoreWindow.git