Improve math module (#396)

* Improve math module

- Mark almost everything constexpr
- Equality (a == b) is now exact, down to the bit level. If you want approximate equality use the new ApproxEqual method/static method
- Rename Nz::Extend to Nz::Extent
- Removed Make[] and Set[] methods in favor of their static counterpart and operator=

src/Nazara/Utility/Formats/MD2Loader.cpp

@@ -197,7 +197,7 @@ namespace Nz
 						Vector2f uv(texC.u, texC.v);
 						uv *= invSkinSize;
 
-						uvPtr[triangles[i].vertices[fixedIndex]].Set(parameters.texCoordOffset + uv * parameters.texCoordScale);
+						uvPtr[triangles[i].vertices[fixedIndex]] = parameters.texCoordOffset + uv * parameters.texCoordScale;
 					}
 				}
 			}

src/Nazara/Utility/Formats/MD5AnimLoader.cpp

@@ -83,7 +83,7 @@ namespace Nz
 						sequenceJoint.rotation = rotationQuat * frames[frameIndex].joints[jointIndex].orient;
 					}
 
-					sequenceJoint.scale.Set(1.f);
+					sequenceJoint.scale = Vector3f::Unit();
 				}
 			}