Updated documentation for version 2.1.0 with "response parsing" section.

Author: pmalmsten

docs/source/index.rst

@@ -102,8 +102,7 @@ asynchonous notification of received data is needed::
 
    When asychonous mode is enabled, the provided callback method
    is called by a background thread managed by the xbee package.
-   Any/all thread safety considerations may apply when employing 
-   this functionality to modify external state.
+   Make sure that updates to external state are thread-safe.
 
 Note that a background thread is automatically started
 to handle receiving and processing incoming data from an
@@ -157,6 +156,31 @@ sample dictionary will always follow this pattern::
 The number of dio and adc values returned depends upon the type and
 configuration of the XBee device used with this library.
 
+Response Parsing
+~~~~~~~~~~~~~~~~
+
+*As of version 2.1.0*
+
+For XBee devices, sample data within I/O sample messages is automatically
+parsed into the above format. In addition, when an "IS", Force Sample,
+AT command is issued, either to a local device or a remote device, the 
+value of the "parameter" field in the response will be automatically 
+parsed as I/O sample data.
+
+ZigBee devices extend this behavior to include automatic parsing of
+"ND", Node Discover, AT command responses. The parameter field of a 
+ND AT response will assume the following format::
+    
+    {"source_addr":      two bytes,
+     "source_addr_long": eight bytes,
+     "node_identifier":  string,
+     "parent_address":   two bytes,
+     "device_type":      one byte,
+     "status":           one byte,
+     "profile_id":       two bytes,
+     "manufacturer":     two bytes,
+    }
+
 Sending Data to an XBee Device
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~