create final 3.8 release

CHANGELOG.rst

@@ -1,9 +1,20 @@
-3.8 (in development)
---------------------
+3.8
+---
 Enhancements:
 - Added support for analysing logs containing the "id    | " prefixes added when running a correlator inside docker. 
 - Improved sort order of log files to only include time when we know there are multiple different instances. 
 - Moved sent events/tx to a secondary axis so that the event rate chart lines up with other charts with two axes. 
+- Renamed ``--config`` userStatusLines ``keyPrefix`` to ``fieldPrefix`` and ``key:alias`` to ``field:alias`` for 
+  clarity. 
+- Added charting of apama-ctrl "Proxy Status: " lines indicating the number of started/pending/failed incoming requests 
+  from Cumulocity core nodes handled by the apama-ctrl proxy. This charting is enabled automatically when the 
+  associated log lines are detected. Since it is necessary to know at start of parsing how many columns are needed, 
+  a default of 4 is used and the parsing is retried with the number doubled if it is found not to be enough. 
+- Added ``keyRegex`` and ``maxKeysToAllocateColumnsFor`` to userStatusLines which automatically create numbered columns 
+  for a dynamic set of status lines each identified by a unique key, e.g. multiple named JMS receivers. See the 
+  README.rst for an example. 
+- Changed display of charts with only one y axis to put all data onto the right-hand "y2" axis which makes such charts 
+  line up with charts that have two y axes (fixes GH-16). 
 
 Bug fixes:
 - Fixed error when si/so have NaN values which can happen occasionally.