README.rst: Major update, expand more on what is required for which API

README.rst

@@ -1,3 +1,6 @@
+python-inema
+============
+
 This is a python module for interfacing the "Internetmarke" API provided
 by the German postal company "Deutsche Post".  It implements V3 of this
 API.  It also implements the new (2020) "Warenpost International API".
@@ -6,14 +9,34 @@ The Internetmarke API allows you to buy online franking for national and
 international postal products like post cards and letters of all weight
 classes and service classes (normal, registered, ...).
 
-In order to use this module, you will need to be registered with
-Deutsche Post for accessing the "1C4A Webservice".  You can request
-related details from pcf-1click@deutschepost.de.  Upon registration,
-you will receive your individual parameters PARTNER_ID, KEY and
-KEY_PHASE.
+Internetmarke API
+-----------------
 
-Furthermore, for actual payment of purchases made via this API, you will
-need the user name (email address) and password to a "Portokasse"
-account.
+In order to use the Internetmarke API (SOAP), you will need to be registered
+with Deutsche Post for accessing the "1C4A Webservice".  You can request
+related details from pcf-1click@deutschepost.de.  Upon registration, you
+will receive your individual parameters PARTNER_ID, KEY and KEY_PHASE.
 
 This module makes use of the fairly new "zeep" module for SOAP/WSDL.
+
+
+Warenpost International API
+---------------------------
+
+In order to use the Warenpost International API (REST), you will need to
+be separately registered with Deutsche Post for accessing that API.
+Upon registration, you will have the following individual parameters,
+which you must use when initializing the WarenpostInt() class:
+
+- PARTNER_ID
+- SCHLUESSEL_DPWN_PARTNER (same as KEY?)
+- EKP
+- KEY_PHASE
+
+
+Portokasse
+----------
+
+Furthermore, for actual payment of purchases made via both APIs, you
+will need the user name (email address) and password to a "Portokasse"
+account.