Commit fd13abc1d04f58afb0dcaefea7367492088a46fc[github.com]

• using the same models I modified for Vas - no use in maintaining two seperate sets
  
• the idle flame is colored more blue than teal, now
  
• the thrust flame is slightly less colorful and a little brighter

• included the BlueprintClasses.sbc kindly provided by Vas. Ion thrusters can now be selected as production targets in assemblers.
  
• changed the ion thruster markings to a proper sign

added build stages to all the 1x1 thrusters (the 2x2 thruster still has none)

Slanted blocks now have a proper slanted collision model

categorized as "block"

• slanted versions
  
• small-ship 1x1x1 versions
  
• changed the thruster flame a bit