More extensive materials list

[quigley]

This is a two part request.

1. All the materials from Hypershot should be available in Keyshot by default - Keyshot has more materials of the same kind (like loads of different colours of anodised aluminium for example).

2. There should be a lot more materials by default. The current selection is too limiting - for example:

Perforated mesh materials - very difficult to get mapping right with just the General shader
Non metallic paint finishes - doable but these should be defaults.
More extensive glass and translucent materials
More woods