added ability to use equations in spec.populations(*).mechanisms(*).equations
added ability to use equations in spec.populations(*).mechanisms(*).equations

asoplata/DynaSim,asoplata/DynaSim,asoplata/DynaSim,DynaSim/DynaSim,DynaSim/DynaSim,kupiqu/DynaSim,DynaSim/DynaSim,kupiqu/DynaSim,kupiqu/DynaSim,DynaSim/DynaSim,asoplata/DynaSim,DynaSim/DynaSim,kupiqu/DynaSim,asoplata/DynaSim