Add Meteor.users = new Meteor.Collection('users')

Although this is very easy to do with project specific stubs, I think it's good to have `Meteor.users = new Meteor.Collection('users')` as part of `meteor-stubs.js` since Meteor.users is a collection created by Meteor automatically, so it's less of a "surprise factor" for noobs (such as admittedly - myself)
Merge pull request #38 from rantav/patch-1

Add Meteor.users = new Meteor.Collection('users')
Update karma.conf.js

Rewrite Karma config file to what Karma expects. Should fix issue #42. Default settings should be exactly the same.
Should fix issue #39. Add a place for common stubs that depends on the Meteor stubs. (also re-submit updated issue #42 to include the extra stubs)
Merge pull request #43 from eprochasson/patch-1

Update karma.conf.js
updating RTD to use the latest karma (and merging a PR)
updating RTD to use the latest karma (and merging a PR)
enabled logging from Karma
Unit coverage seems to be working again with latest Karma
adding stubs for Meteor.loginWithGoogle