geotrellis/geotrellis — pull request #740 by ameetkini (2014-02-20 22:46:44+00:00)
Title: Add Operations (not finished yet)

The major enhancements in this pull request are:
1. Various flavors of local Add operation (add raster to constant, add raster to raster, etc.)
2. A more functional RasterReader. This one has the ability to perform range lookups.
3. Test infrastructure to create / destroy spark contexts

Pending changes in this pull request are:
1. Correctly passing in metadata to result of operation
2. Generalize the withMetadata to withAnythingTheResultNeeds (with a better name, of course :) )
3. other simple local operations (-, *, /, etc.)