NORSPEC-261 No more magic numbers, parity between forward and deferred rendering WRT to windlight and legacy shininess.

Reviewed by Graham (a little bit).

NORSPEC-257 can't use automated TEMaterialGet functor as we need two possible defaults for diffuse alpha mode based on the alpha content of the diffuse texture

NORSPEC-222 fix issues with removing the use texture item selecting weave when the TE was BUMPY_TEXTURE, but no normal map was applied

NORSPEC-251 fix issues with not binning objects changed from having a material to using legacy bumps causing incorrect rendering

NORSPEC-247 Fix for rigged attachments with alpha masking on occluding alpha object when 100% transparent.

NORSPEC-233 WIP fix completely bogus substitution of offsets for scales and make scale accessors get with the program