initial commit
clarified variable names, added comments
adding comments
added theta for density dependence
testing pow in denominator -- FIXME
reverting to e2b9252cd -- pow is model issue, not code issue
moving pow to denom, rounding to int -- simpler semantics
tried adding Savail, no major change; modified theta to scale beta rather than N
random imports, new formulation of force of infection
added Sfrac and Sresid; new formulation of Rf_rpois to do error checking for max # of events
added lots of new params, cleaned up some, added docs. havent tested import formulations yet
update metapop/connection, divide by city size
twiddling imports and effect of N -- added /N to Ieff for everyone.
working state, fixed bug in ndeltaR double-negative
working state, fixed bug in ndeltaR double-negative
no Neffective state needed.  added more rules for deltaR to avoid negatives upon extinction
removed some unused variables.  changed names of some (observation) state variables.  separated imports and internal latent_rate, cleaner now.  setting state is now just SEIR, 4 variables.  Returning #E, #Eimport, and #I per nstep, as well as Iobserved.
minor changes -- commenting out unused/previously tested model params
added method to return full metapop matrix of a single state that trims to only return simd weeks.  this is the preferred method to extract model results.
minor changes, using dS and dR instead of births and deltaR