geotrellis/geotrellis — pull request #668 by lossyrob (2013-12-05 23:26:19+00:00)
Title: Gave the ability to have zonal summary use cached results.

- Added a .cached method to DataSourceLike that caches the results
of the elements on the local machine.
- Refactored zonal summary methods to take in cached results
to be used on the full tile intersections.

Fixes #626