Major improvements on policy configuration

- Bugfixes on change_policy
- Replaced _consent modules with configurable modules

modpol_core/modules/template.lua

@@ -26,9 +26,12 @@ module_template.data = {
 -- When calling a module from within another module,
 -- variables not defined in config will be ignored.
 -- Default values set in config can be overridden
+-- @field approval_module names a module that must pass before approval; defaults to false
 -- @field field_1 ex: votes_required, default = 5
 -- @field field_2 ex: voting_type, default = "majority"
 module_template.config = {
+    approval_module = false -- visible but empty
+    hidden_config = nil -- not visible to users unless used
     field_1 = 5
     field_2 = "majority"
 }