Add new algorithms

[edwinb-ai]

New algorithms are needed, and the following are good places to start:

• [ ] Firefly algorithm, chaotic version (Gandomi, A. H. et al. (2013) ‘Firefly algorithm with chaos’, Communications in Nonlinear Science and Numerical Simulation, 18(1), pp. 89–98. doi: 10.1016/j.cnsns.2012.06.009. )
• [ ] Bat algorithm, original version (Yang, X.-S. (2011) ‘Bat algorithm for multi-objective optimisation’, International Journal of Bio-Inspired Computation, 3(5), pp. 267–274. doi: 10.1504/IJBIC.2011.042259. )
• [ ] Grey Wolf optimizer, original version (Mirjalili, S., Mirjalili, S. M. and Lewis, A. (2014) ‘Grey Wolf Optimizer’, Advances in Engineering Software, 69, pp. 46–61. doi: 10.1016/j.advengsoft.2013.12.007. )
• [x] Simulated Annealing

[edwinb-ai]

The classic version for the simulated annealing algorithm has been implemented in #34

The generalized version of simulated annealing was added in #35