This is a major commit with numerous changes.

* The default permissions mechanism has been beefed up, made more consistent, implemented for both MongoDB queries affecting many documents and ad hoc inquiries about a particular object, and generally moved a long, long way down the road. You will no longer want to set the `permissions` option to your own method in most cases. See: https://github.com/punkave/apostrophe-sandbox/wiki/Adding-people-and-groups-to-your-existing-project
* The apos.get method, and derivatives like snippets.get, now have separate `criteria` and `options` parameters. `criteria` is passed straight to MongoDB, typically in an $and with other criteria. `options` is the new home for custom options we implement ourselves, like the `published` option that accepts `1`, `0` or `any`, and also for options that affect the way results are returned, like `skip`, `limit` and `fields`. This means a significant change in all subclasses of snippets is needed. See: https://github.com/punkave/apostrophe-sandbox/wiki/BC-break-to-apos.get,-snippets.get-and-friends
* jQuery 1.10.1, with full source (our own minifier is fine for production)
* Better support for jquery.selective
Merge branch 'master' of github.com:punkave/apostrophe

Conflicts:
	public/css/editor.less