* New commands in coupling communication to get the values necessary to compute the water balance (see in wiki)
	* To get the catchment runoff it was necessary to add a link to
this variable in the j2k_cowat_buech_ju_couplage.jam file and to remove
an artificial reach in the reach parameter file that is now followed in
this repository (as for all used parameter files)
	* new feature of the getAtrribute command that now takes a list
of attributes names and returns a table of value for each id (for reachs
and hrus)