Remove reader iterator from Greyhound driver.
start excising Bounds in favor of a BOX3D
refactor calculateBounds #484
switch off Bounds
final removal of Range and Vector to complete refactor of Bounds->BOX3D #484
use Utils::sround rather than std::round to fix #489
Merge pull request #492 from chambbj/issues/489-windows-round

use Utils::sround rather than std::round to fix #489
Merge pull request #485 from PDAL/ghUpdate

Remove reader iterator from Greyhound driver.
Merge pull request #484 from PDAL/issues/484-refactor-bounds

Bounds<T> is overengineered