[common] Preliminary framework for tile-based operation
[colorspace] Tiled implementation of colorspace module
[depth] Tiled implementation of depth module
[resize+unresize] Replace ImagePlane parameters with ImageTile
[common] Delete plane.h
[resize] Separate horizontal and vertical passes
[resize] Tiled implementation of resize module
[unresize] Cleanup
[unresize] Separate horizontal and vertical passes
[resize+unresize] Restore shortcut path for 1D scaling
[resize] Pad filter data to a multiple of 64 rows
[common] Rename align/mod functions to ceil_n and floor_n
[common] Add type safety to ImageTile class
[common] Require all tiles to be 64x64
[resize] Eliminate temporary buffer requirement
[common] Update API to expose tiling