Clarified features in README

Author: christiansandberg

README.rst

@@ -11,14 +11,24 @@ The library supports Python 2.7 and 3.4+.
 Features
 --------
 
-* Object Dictionary from EDS
-* NMT master/slave
-* SDO client/server
+The library is mainly meant to be used as a master.
+
+* NMT master
+* SDO client
 * PDO producer/consumer
-* SYNC producer/consumer
-* EMCY consumer/producer
+* SYNC producer
+* EMCY consumer
 * TIME producer
 * LSS master
+* Object Dictionary from EDS
+
+Incomplete support for creating slave nodes also exists.
+
+* SDO server
+* PDO producer/consumer
+* NMT slave
+* EMCY producer
+* Object Dictionary from EDS
 
 
 Installation