Update CHANGELOG for 1.5.0 release
Update CHANGELOG for 1.5.0 release

azavea/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry,raster-foundry/raster-foundry,azavea/raster-foundry,azavea/raster-foundry,raster-foundry/raster-foundry,aaronxsu/raster-foundry,aaronxsu/raster-foundry,azavea/raster-foundry