Added ChemicalEquilibrium example.
Added about text for Chemical Engineering example.
Added Structural Optimization
Added StructuralOptimization.
Added StructuralOptimization
Added BlendingProblem.
Added About.txt
Added AircraftAssignement.
Added OilPipelineDesign
Added NetworkDesign. can be improved by adding flow-cutset inequalities
Added FilterDesign.
Added Capacited Vehicle Routing Problem.
Added Structural Optimization.
Added RobotArm
Added Hanging Chain
Added Largest Small Polygon
Added VRPTW
Added Goddard Rocket
Correction of RobotArm/About.txt
Modified NetworkDesign