Implement Havok 550 data classes

[Nostritius]

As mentioned in #30, OpenAWE is missing almost all implementations of the Havok 550 format for creating the physics shapes and animations necessary for the first Alan Wake. This causes a lot of MemoryStream Errors during the start. For how to differentiate between both version look at the loading of a hkaSkeleton object (The only one already implemented for both version. Here are some shapes which are implemented in the 2010 version but not in the 550 version:

• hkRootLevelContainer

• hkxScene

• hkaSplineCompressedAnimation

• hkaAnimationBinding

• hkaAnimationContainer

• hkaDefaultAnimatedReferenceFrame

• hkpRigidBody

• hkpBoxShape

• hkpCylinderShape

• hkpConvexTRanslateShape

• hkpConvexTransformShape

• hkpListShape

• RmdPhysicsSystem