Support for NiLight light sources

Re discussion in https://forum.openmw.org/viewtopic.php?f=2&t=2766&sid=d8e186b7a2c0d62ff9353823a7a42dde

NIFSkeletonLoader: Warn: Unhandled NiDirectionalLight __MAX_Default_Light in meshes\abot\ab01fishingrod.nif error in logfile when running Abot's water life indicates unhandled property in Nif format.

(RM-2391 from redmine: created on 2015-02-20 by R G, , relates #3011 (closed))

List of unsupported nodes:

  1. NiAmbientLight
  2. NiSpotLight
  3. NiPointLight
  4. NiDirectionalLight
  5. NiLightColorController
  6. NiLightIntensityController
  7. NiLightDimmerController
Edited by Andrei Kortunov