[#82] Replace sponza with PBR version

...cts/voxelization/resources/Sponza/Textures/Thorn_Spec.jpg

...voxelization/resources/Sponza/Textures/VaseRound_Diff.jpg

...voxelization/resources/Sponza/Textures/VaseRound_Norm.jpg

...voxelization/resources/Sponza/Textures/VaseRound_Spec.jpg

...ects/voxelization/resources/Sponza/Textures/Vase_Diff.jpg

...elization/resources/Sponza/Textures/Vase_Hanging_Diff.jpg

...elization/resources/Sponza/Textures/Vase_Hanging_Norm.jpg

...elization/resources/Sponza/Textures/Vase_Hanging_Spec.jpg

...ects/voxelization/resources/Sponza/Textures/Vase_Norm.jpg

...ects/voxelization/resources/Sponza/Textures/Vase_spec.jpg

projects/voxelization/resources/Sponza/Textures/white.png

projects/voxelization/resources/Sponza/sponza_arch_diff.png

...s/voxelization/resources/Sponza/sponza_ceiling_a_diff.png

...ts/voxelization/resources/Sponza/sponza_column_a_diff.png

...ts/voxelization/resources/Sponza/sponza_column_b_diff.png

...ts/voxelization/resources/Sponza/sponza_column_c_diff.png

...oxelization/resources/Sponza/sponza_curtain_blue_diff.png

...cts/voxelization/resources/Sponza/sponza_curtain_diff.png

...xelization/resources/Sponza/sponza_curtain_green_diff.png

...cts/voxelization/resources/Sponza/sponza_details_diff.png