+- prepaid card support updated: now includes a web generator, agent-specific
+ prepaid cards, and creates *payments*, not credits
+- preliminary setup for Slony-1 PostgreSQL replication
+- reformatted latex invoice templates w/Text::Template (khoff) and removed
+ some useless fields (quantity/unit price)
+- simplified upgrade instructions
+- add export to vpopmail SQL
+- html invoices