Nowhere near done yet, but checking in a snapshot of semi-working code. There is some simultaneous support for both with and without use of the Invoice/Receipt account. I want to do away with them completely, but will need to change how sitelink payments are mapped (right now, they split a payment into multiple parts to match the charge).

git-svn-id: file:///svn-source/pmgr/branches/single_AR_20090622/site@181 97e9348a-65ac-dc4b-aefc-98561f571b83

models/ledger_entry.php

@@ -11,6 +11,8 @@ class LedgerEntry extends AppModel {
 	var $belongsTo = array(
 		'MonetarySource',
 		'Transaction',
+		'Customer',
+		'Lease',
 
 		'DebitLedger' => array(
 			'className' => 'Ledger',