Resolve #2021 "04 16 branched from master ini file device"

Completed ini example. Don't merge before !23 (merged). Small unrelated change slipped in to this branch, will need to fix that first.

devices/clients/ini_client.py

@@ -30,8 +30,9 @@ import os
 
 class ini_client(CommClient):
     """
-    this class provides an example implementation of a comms_client.
-    Durirng initialisation it creates a correctly shaped zero filled value. on read that value is returned and on write its modified.
+    This class provides an example implementation of a comms_client.
+    
+    During initialisation, it creates a correctly shaped zero-filled value. On read, that value is returned, and on write it is modified.
     """
 
     def start(self):