To extend and clarify VISU IDL definition.

To extend and clarify VISU IDL definition.
1. Three new functions are added to the ColoredPrs3d interface, namely
    /*!
     * Gets the min boundary of the scalar bar from source data.
     */
    double GetSourceMin();

    /*!
     * Gets the max boundary of the scalar bar from source data.
     */
    double GetSourceMax();

    /*!
     * Defines whether the scalar range corresponds to the source data or not.
     */
    boolean IsRangeFixed();
2. A new function is introduced in the ScalarMap interface, namely
    /*!
     * Sets scalar range that corresponds to the source data.
     */
    void SetSourceRange();
3. Three functions are removed from ScalarMapOnDeformedShape, because they have the same meaning as in ScalaraMap (a basic interface for it), namely
    /*!
     * Sets the source ranges of pipeline
     */
    void SetSourceRange(in double theMinRange,in double theMaxRange);
    /*!
     * Gets the minimum source range of pipeline
     */
    double GetSourceRangeMin();
    /*!
     * Gets the maximum source range of pipeline
     */
    double GetSourceRangeMax();