Switched everything over to use can.* functions from telescope-lib instead of using can* functions from lib/permissions.js, deleted lib/permissions.js, added some tests for permissions, and some other random cleanup like deleting unused code.
Conflicts:
client/views/comments/comment_form.js
Using {{pathFor}}, path(), and url() where possible. Passing in path
to Meteor.absoluteUrl() where the IronRouter functions didn't make sense.
Also deleting some random unused code.
We're using a fork with a different definition of "isAdmin" (using
``meteor-roles`` rather than the boolean user.isAdmin). ``lib/user.js``
provides abstracted methods for reading admin state, which makes it very
easy to change our definition -- except that the abstractions weren't
used universally.
This commit finishes the job of using the abstractions, and adds a few
new parts to also allow abstracting setting and updating admin-ness:
- setAdmin: sets admin status directly on a user object.
- updateAdmin: executes a mongo update to set admin status.
- adminMongoQuery: the query parameter for admin-ness, for composing
user queries with other fields.
- notAdminMongoQuery: the query parameter for not-admin-ness.
