README update

Author: mohanjith

README.md

@@ -1,4 +1,36 @@
 py-finvoice
 ============
 
-Python module for generating Finvoice invoices
+Python module for generating Finvoice invoices.
+
+Finvoice message can be used for invoicing and for other business messages, such as quotations, orders, order confirmations, price lists, etc. Due to easy adoption, it is suitable for invoicing between companies of all sizes and for consumer invoicing.
+
+This Python module is based on the XSDs released by the Federation of Financial Services, Finland. 
+
+#Tested
+
+XML generated have been validated.
+
+## Ilmoittamissanomat
+- FinvoiceSenderInfo (SI)
+- FinvoiceReceiverInfo (RI)
+
+## Finvoice
+- Finvoice
+- Finvoice Attachment
+- Finvoice Ack
+
+## SOAP EBML
+- Envelope
+- MessageHeader
+
+# Road Tested
+
+XML generated has been used in actual transactions
+
+## Ilmoittamissanomat
+- FinvoiceSenderInfo (SI)
+
+## SOAP EBML
+- Envelope
+- MessageHeader