Add some of a billing daemon skeleton

Summary:
Ref T6881. This adds the worker, and a script to make it easier to test. It doesn't actually invoice anything.

I'm intentionally allowing the script to double-bill since it makes testing way easier (by letting you bill the same period over and over again), and provides a tool for recovery if billing screws up.

(This diff isn't very interesting, just trying to avoid a 5K-line diff at the end.)

Test Plan: Used `bin/phortune invoice ...` to get the worker to print out some date ranges which it would theoretically invoice.

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T6881

Differential Revision: https://secure.phabricator.com/D11577

scripts/setup/manage_phortune.php

@@ -0,0 +1,21 @@
+#!/usr/bin/env php
+<?php
+
+$root = dirname(dirname(dirname(__FILE__)));
+require_once $root.'/scripts/__init_script__.php';
+
+$args = new PhutilArgumentParser($argv);
+$args->setTagline('manage billing');
+$args->setSynopsis(<<<EOSYNOPSIS
+**phortune** __command__ [__options__]
+    Manage billing.
+
+EOSYNOPSIS
+  );
+$args->parseStandardArguments();
+
+$workflows = id(new PhutilSymbolLoader())
+  ->setAncestorClass('PhabricatorPhortuneManagementWorkflow')
+  ->loadObjects();
+$workflows[] = new PhutilHelpArgumentWorkflow();
+$args->parseWorkflows($workflows);