Update simulations.jl

Addition of a function now(ev::Event).

The function is similar to call now(environment(ev)) but allows shortcuts when writing event callbacks using the simulation time.

Author: fbastin

src/simulations.jl

@@ -44,6 +44,10 @@ function now(sim::Simulation)
   sim.time
 end
 
+function now(ev::Event)
+  return now(environment(ev))
+end
+
 function active_process(sim::Simulation) :: AbstractProcess
   get(sim.active_proc)
 end