Added schedule:list, fixed traffic import service, fixed invoice generation with charges and credit amounts

app/Console/Commands/InvoiceGenerate.php

@@ -47,6 +47,7 @@ class InvoiceGenerate extends Command
 
 		foreach ($accounts as $o) {
 			$io = new Invoice;
+			$io->account_id = $o->id;
 
 			foreach ($o->services(TRUE)->get() as $so) {
 				foreach ($so->next_invoice_items(FALSE) as $ooo)
@@ -54,7 +55,7 @@ class InvoiceGenerate extends Command
 			}
 
 			// If there are no items, no reason to do anything
-			if (! $io->items->count())
+			if (! $io->items->count() OR $io->total < 0)
 				continue;
 
 			$io->account_id = $o->id;