MaxN and MinN operations
Merge remote-tracking branch 'upstream/master' into feature/selection
Update files for new directories
Merge remote-tracking branch 'jchien14/feature/selection' into codereview/jchien14/minNmaxN
Added benchmark to test implementations.
Merge remote-tracking branch 'upstream/master' into feature/selection
Merge branch 'codereview/jchien14/minNmaxN' of https://github.com/lossyrob/geotrellis into feature/selection
Add benchmark; update Op[Raster] to Raster
Change implementation to in-place quickselect, remove other algorithms
Merge pull request #754 from jchien14/feature/selection

MaxN and MinN