Added dynamically updating settings to the settings class.  This includes an option for doing mpi runs on non-host nodes only
Added dynamically updating settings to the settings class.  This includes an option for doing mpi runs on non-host nodes only

dflemin3/ICgen,dflemin3/diskpy,ibackus/diskpy,dflemin3/diskpy,ibackus/diskpy,trquinn/ICgen,ibackus/ICgen