Added change_modules mod and lots of bugfixes. Now merging to master.

modpol_core/util/misc.lua

@@ -0,0 +1,9 @@
+--- @function modpol.copy_table
+-- Returns a copy of the table inputted
+function modpol.copy_table(t)
+   local t2 = {}
+   for k,v in pairs(t) do
+      t2[k] = v
+   end
+   return t2
+end