Avoid deprecated classes and functions

In every release of FBX SDK, new classes and functions are added, while others are deprecated. A deprecated function is declared as K_DEPRECATED. Here is an example:

K_DEPRECATED KFbxTakeNode* GetDefaultTakeNode();

You can continue to use deprecated functions, but:

Your compiler will throw a warning.
Functions that are deprecated in the current release will be removed completely in the next release.