HedgeLib++ - Support same Hedgehog Engine formats as C# HedgeLib

[Radfordhound]

Specifically, this means HedgeLib++ should be able to do all of the following:

• [ ] Read Lights (.light)
• [x] Read Models (.model, .terrain-model) [5dba8b4f8dece1b3d03d681246b13eceaef29c8b]
• [X] Read Materials (.material) [f4905e249e69ae87b0746d8efc56864cb00d84fe]
• [X] Read Texture Information (.texture) [f4905e249e69ae87b0746d8efc56864cb00d84fe]
• [X] Read Texture sets (.texset) [f4905e249e69ae87b0746d8efc56864cb00d84fe]
• [ ] Write Lights (.light)
• [x] Write Models (.model, .terrain-model)
• [ ] Write Materials (.material)
• [ ] Write Texture Information (.texture)
• [ ] Write Texture sets (.texset)

[Radfordhound]

8abad5d0769d6543b0b246fd8baec3b22272ab69 Added support for reading Hedgehog Engine models