Optimizer

// classes

class QPanda::AbstractOptimizer;
class QPanda::Brent;
class QPanda::OptimizerFactory;
class QPanda::OriginCOBYLA;
class QPanda::OriginLBFGSB;
class QPanda::OriginNelderMead;
class QPanda::OriginPowell;
class QPanda::OriginSLSQP;