Topic: Client 704 - 706 changes

Added new about window.
Refactored dialog mode name to modal.
Added special hull assets type.
Hulls are now loaded with the new asset type.
Added hull animation support to spin type hulls.
Added hull animation support to paint shop and scanner window.
Updated client icon.
A lot of other fixes, refactoring and improvements.
Fixes asteroid belt not showing correctly when antialiasing switched off.

Amethyst        T0    Pyr     21
Cisco                T4    Sco    70
Delphi              T0    Eng    90
Neuropath      T0    Tel     10