Previously, all modules in an org were fully copied into that
org. Now, the only copy of the modules is at modpol.modules, and orgs
have a policy table at [org].policies, which overrides the config
table in any given module.

Created change_policy module (though it still does not have an
approval flow; improved display_policies and display_processes modules.

Added basic policy backend for modules. Also added confirmation in CLI to call a module. At that confirmation, the relevant policies are shown. Still need to create a module for changing policies and to add more configuration options to existing policies.

Doc comments

See merge request !34

Process delete

See merge request !33

added parent/children ids to processes, modified delete process to be...

See merge request !32

added parent/children ids to processes, modified delete process to be recursive, modules now have access to self:call_module

Created remove_process module---mostly works, but there are still some issues with processes and pending actions not being removed properly