feat: load and apply .XML static mesh metadata

[dadavidtseng]

a. Before you try loading Woman.OBJ, try loading Woman.XML first; if present, that file should contain metadata information about the model which informs your parsing of it.
b. This must at least include information about the model’s orientation (helping you decide how to transform it on import) and scale (helping you decide how to scale it on import).
c. It should also include the names of any textures that should be used with that model; specifically we are using Blinn-Phong texture maps including: diffuse, normal (tangent-space), and a combination Specular-Glossy-Emissive map (see Assignment SDST-A03).