Tokutek/mongo — pull request #517 by leifwalsh (2013-09-13 15:59:15+00:00)
Title: merge V8, 2.4 aggregation, and commands returning cursors

- Adds the V8 javascript engine as default, fixes #161
- Adds aggregation optimizations and refactoring up through 2.4.6, fixes #516
- Adds DBCommandCursor, fixes #503