gamechanger/mongothon — pull request #31 by tleach (2014-02-07 20:02:52+00:00)
Title: Smarter ScopeBuilder

This is a backward incompatible change to the Scopes feature of Mongothon.

### Changes:
- `execute()` has been eliminated as a method on `ScopeBuilder`.
- `ScopeBuilder` itself now implements the iterator protocol and can be iterated over / indexed into directly.
- `ScopeBuilder` is also able proxy calls through to an underlying cursor which is created on-demand.
- You can also reuse an existing builder to further refine search results, even if that builder's query has already been executed.

### Upgrade Notes:
You'll need to remove calls to `execute()` on a given scope, and instead use the scope itself directly.

cc @byels @paetling @nrschultz