 
  desc: Copy dir into target dir.
       
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  format: cp <pathSrc> <pathDest> [name] [scriptFileName]
  
          You need name and scriptFileName if you copy material, particle or gpuProgram.
          The copy must be meaningful.
          You must copy affector or emitter to particle. Or copy particle to particle root.
          You can not copy technique to particle.

		  scriptFileName work the same as add command.
                                                            
  eg : cp PointEmitter0 .
       cp fire . newFire firework.particle