Merge pull request #151 from einhverfr/1.3

Release notes update

doc/release_notes

@@ -121,6 +121,11 @@ exposed through  the user interface, and a maximum value which is not yet
 exposed.  The handling of these are module-specific.  The Simple tax module 
 treats these as operating on the subtotal of the invoice.
 
+AS OF LEDGERSMB 1.3.40 A SALES TAX CALCULATION BUG WAS CORRECTED.  Prior to 
+this revision, line items were rounded off unintentionally to a low precision value before sales tax was calculated.  For most users this might alter the amount on an invoice by only a few cents per invoice.   If a significant bias exists, 
+since it may be a few cents per line item, this can add up. This issue affected 
+all versions of LedgerSMB 1.3 through 1.3.39, and was first corrected in 1.3.40.
+
 
 2.8:  New CSS hooks