dynamic cubemapped statics

engine: implements the capacity for tsstatic objects to allow themselves to use the reflector system in order to display dynamic cubemaps.

script: defines a calibrated reflectordesc that reflects all object types within the space of approximately half stock veiwdistance
usage: cubeReflectorDesc = DefaultCubeDesc placed in a given object-insatnces entry that uses a material with a dynamiccubemap = true; flag.
immediate purpose: consistency of application of materials.
long term impact: tags steps required in order to associate a given runtime generated cubemap with an object-instance. in the future, this is likely to give way to an area cubemap, or a screenspace reflection.