1) the no competition case now has intraspecific competition.  Otherwise it doens't make sense and populations get 1e18 biomass in a season.  the invasive case must be the within season growth when there is no one else around to compete with.  still need the invasive species biomass to change and draw down R to its Rstar.
2) can now remove the different timestep for the no comp case
3) now need RnoC to be by species b/c each species must be run as an invasive with different R dynamics