Make mem and time limit no constats to be set from outside

src/memory_utils.jl

@@ -1,12 +1,12 @@
 
-const optim_max_mem=10.0 # in GB for the whole current process ignoring if things could run in parallel
-const optim_time_limit=20.0 # in seconds a single Optim.jl optimization step
+optim_max_mem::Float64 = 10.0 # in GB for the whole current process ignoring if things could run in parallel
+optim_time_limit::Float64 = 20.0 # in seconds a single Optim.jl optimization step
 
 """
     set_memlimit(gig::Float64)
     Set memory limit in GB for the whole current process ignoring if things could run in parallel
 """
-function set_memlimit(gig::Real)
+function set_memlimit(gig::Float64)
     @info "Setting `Optimization.jl` memory limit to $gig GB"
     global optim_max_mem=gig
 end
@@ -15,7 +15,7 @@ end
     set_timelimit(sec::Float64)
     Set time limit in seconds a single Optim.jl optimization step
 """
-function set_timelimit(sec::Real)
+function set_timelimit(sec::Float64)
     @info "Setting `Optimization.jl` time limit to $sec seconds"
     global optim_time_limit=sec
 end