Added ACO-R to inversion.solvers
Added ACO-R to inversion.solvers

Ant Colony Optimization for Continuous Domains by Socha and Dorigo
(2008). A heuristic optimization method based on the behaviour or
foraging ants. This is the extension for continuous domains. Doesn't
need to encode real numbers.

drandykass/fatiando,fatiando/fatiando,fatiando/fatiando,victortxa/fatiando,rafaelmds/fatiando,eusoubrasileiro/fatiando,mtb-za/fatiando,santis19/fatiando,eusoubrasileiro/fatiando_seismic,cmeessen/fatiando,eusoubrasileiro/fatiando,mtb-za/fatiando,victortxa/fatiando,rafaelmds/fatiando,eusoubrasileiro/fatiando,cmeessen/fatiando,eusoubrasileiro/fatiando_seismic,santis19/fatiando,drandykass/fatiando