Add more classical named designs

[emitanaka]

• [x] Balance incomplete block design (is this possible?)
• [ ] Alpha designs - Patterson and Williams(1976)
• [ ] Cyclic designs - John, J.A. (1981) Efficient Cyclic Design
• [ ] Augmented block designs
• [x] Latin square design
• [x] Graeco-Latin square design
• [ ] Lattice designs
• [x] Strip plot design
• [x] Youden square design
• [x] Factorial design

[nfultz]

• [ ] Fractional Factorial design