Spec RngFunctor

Functor wrapper for random number generation.

/*!
 * @class RngFunctor
 * 
 * @extends Rng
 * 
 * @headerfile <seqan/random.h>
 * 
 * @brief Functor wrapper for random number generation.
 * 
 * @signature template <typename TRng, typename TPdf> class Rng<RngFunctor<TRng,
 *            TPdf> >;
 * 
 * @tparam TRng The random number generator type to use.
 * @tparam TPdf The probability density function type to use.
 * 
 * @fn RngFunctor::Rng
 * 
 * @headerfile <seqan/random.h>
 * 
 * @brief Constructor.
 * 
 * @signature Rng::Rng(rng, pdf);
 * 
 * @param[in] rng A reference to the underlying Rng to use.
 * @param[in] pdf A reference to the underlying Pdf to use.
 */