Add a reactive ready() method to subscription handles. Fixes #273.
Add a reactive ready() method to subscription handles. Fixes #273.

Inspired by a pull request from tmeasday (though we've changed the underlying
code enough on ddp-pre1 that I had to rewrite it myself).

Use it in todos. No docs yet, but the Meteor.subscribe docs are already
scheduled for some attention.

Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor,Hansoft/meteor