Update ZMQ Message Reference

ZMQ-Message-Reference.md

@@ -45,10 +45,37 @@ Reply Messages:
 
 ## 'detectorSettings'
 
+Data is a string that corresponds to the name of a detector. For example:
+```
+    msg = ['detectorSettings',   'Counter0' ]
+```
+
+Reply Messages:
+- `["status","ok"]`
+- message from specific detector module with a JSON array, but there doesn't seem to be an implementation yet.
+
+
 ## 'updateDetectorSettings'
 
+Data is a string that corresponds to the name of a detector. Data2 is a JSON array with property, value pairs. For example:
+```
+    msg = ['updateDetectorSettings',   'Counter0', JSON_string ]
+```
+
+Reply Messages:
+- `["status","ok"]`
+
 ## 'estimatedTime'
 
+Data is a JSON scan request (see 'scanRequest' below). For example:
+```
+    msg = ['estimatedTime',   Scan_Request ]
+```
+
+Reply Messages:
+- `["status","ok"]`
+- ['estimatedTime',   NumberOfSeconds ]
+
 ## 'scanRequest'
 
 ## 'abortScan'