Skybox Implementation

[Gabbell]

Story Points: 8

Priority: HIGH

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Sub-Tasks:

• Find the cubemap texture
• Properly load the cubemap texture (Simon)
• Create the skybox model.
• Write a skybox shader.

Completion Criteria:

• The skybox is facing inside and looks gooood.
• The skybox size matches the view projection size.

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#37

[wai-lau]

Right now the skybox size is hardcoded, rather than being the same size as the view projection matrix. So I'm adding some completion criteria.