newly explored regions get added to the available set for future iterations
newly explored regions get added to the available set for future iterations

--HG--
branch : syclop

florianhauer/ompl,utiasASRL/batch-informed-trees,florianhauer/ompl,jvgomez/ompl,sonny-tarbouriech/ompl,florianhauer/ompl,sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl,davetcoleman/ompl,utiasASRL/batch-informed-trees,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,davetcoleman/ompl,jvgomez/ompl,utiasASRL/batch-informed-trees,florianhauer/ompl,sonny-tarbouriech/ompl,florianhauer/ompl,jvgomez/ompl,davetcoleman/ompl,sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,davetcoleman/ompl,jvgomez/ompl,florianhauer/ompl,davetcoleman/ompl,davetcoleman/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl