Merge Request for Issue/16 - implicit override

Closes #16 (closed)

You can save those six precious characters when reading the value of a Scriptable Variable now! You can't have a non-static implicit operator override and so in order to override the implicit override the other direction, we'd actually have to create a new ScriptableVariable instance in code and I think that would cause problems since it's a ScriptableObject and all.

See https://stackoverflow.com/questions/44820341/implicit-conversion-in-c-sharp-without-creating-new-object They're trying to do the same thing we are essentially