updated the grid to handle single systems, also by loading the custom logging....

updated the grid to handle single systems, also by loading the custom logging. then i stumbled on the following: if the .so is loaded once, and then we change and rebuild the library and load it again, it doesnt have effect. the solution to this is to give the newly built library name a random hash in its name. TODO: need to remove the contents of the custom_logging_dir each time the single or population function is done