USC: fixed parameters / added descriptor-type

Fixed the descriptor parameters matching the values of the original
paper (Tombari et al. 2010). The former values have been copied from
3DSC-descriptor and have not been adapted.
    
Added a descriptor type UniqueShapeContext1960.
Hi Sergey,

you're right. I'll change this.

Additionally I've recognized, that I missed to modify the test. 
I'll notify you when I've committed a fixed version.

Jens



----- Ursprüngliche Mail -----
Von: "Sergey Alexandrov" <notifications@github.com>
An: "PointCloudLibrary/pcl" <pcl@noreply.github.com>
CC: "Jens Garstka" <github@webart-factory.de>
Gesendet: Dienstag, 19. August 2014 15:59:57
Betreff: Re: [pcl] USC: fixed parameters / added descriptor-type (#856)

> @@ -1201,6 +1202,18 @@ namespace pcl
>      friend std::ostream& operator << (std::ostream& os, const ShapeContext1980& p);
>    };
>  
> +  PCL_EXPORTS std::ostream& operator << (std::ostream& os, const UniqueShapeContext1960& p);
> +  /** \brief A point structure representing a Shape Context.

Perhaps add the word "unique" in the description?

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