[DynareDev] Minimal required MATLAB version is now 7.9 (R2009b)

Hi, We have decided to raise the minimal required MATLAB version to 7.9 (R2009b). This applies to the master branch and to the upcoming 4.6 release (but not on the stable/4.5 branch). In particular, this means that it is now possible to use the tilde (~) syntax for ignored output and input arguments. I have modernized the code using this syntax where I could easily identify that it was possible (i.e. where “junk” was used as the name of the ignored argument). Best, --  Sébastien Villemot Economist at CEPREMAP Dynare developer http://sebastien.villemot.name