Update smsim-in-R.Rmd

First comments (before the "IPF in R")
The algorithm inside this section are not all reweighting ones... With genetic algorithm you do not put weight to each  individual. So, we can change the name of the section, but it has not to be the name 'reweighting'.

Le Samedi 27 Décembre 2014 22:31 CET, Robin <notifications@github.com> a écrit: 
 
> > @@ -45,7 +45,32 @@ weights <- matrix(data = 1, nrow = nrow(ind), ncol = nrow(cons))
> >  dim(weights) # dimension of weight matrix: 5 rows by 3 columns
> >  ```
> >  
> > -## IPF in R {#IpfinR}
> > +## Different kinds of microsimulation {#KindMS}
> 
> I would call this section 'Reweighting algorithms' or 'Methods of population reweighting' because calculating the weight matrix is just one aspect of the wider spatial microsimulation methodology.
> 
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