Revert "Don't automatically put ?close at the end of Meteor Developer Accounts URLs"

This reverts commit 05d2c5edd77a9c23b665bc35a3f0bd66a70a0546.

We haven't worked out all the backwards-compatiblity issues of
non-?close and ?close OAuth servers and clients yet, so let's leave this
as is now, and ensure that all the services that the tool talks to
accept ?close URLs.