Update CHANGES.md

CHANGES.md

@@ -1,7 +1,7 @@
 # Changes
 
 * 0.5 (April 20, 2014) - Tons of new additions! FtpsiteAgent; WebsiteAgent has xpath, multiple URL, and encoding support; regexp extractions in EventFormattingAgent; PostAgent takes default params and headers, and can make GET requests; local Graphviz support; ShellCommandAgent; BasecampAgent; HipchatAgent; and lots of bug fixes!
-* 0.4 (April 10, 2014) - WebHooksController has been renamed to WebRequestsController and all HTTP verbs are now accepted and passed through to Agents' #receive\_web\_request method. The new DataOutputAgent returns JSON or RSS feeds of incoming Events via external web request.
+* 0.4 (April 10, 2014) - WebHooksController has been renamed to WebRequestsController and all HTTP verbs are now accepted and passed through to Agents' #receive\_web\_request method. The new DataOutputAgent returns JSON or RSS feeds of incoming Events via external web request.  [Documentation is on the wiki.](https://github.com/cantino/huginn/wiki/Creating-a-new-agent#receiving-web-requests).
 * 0.31 (Jan 2, 2014)   - Agents now have an optional keep\_events\_for option that is propagated to created events' expires\_at field, and they update their events' expires\_at fields on change.
 * 0.3 (Jan 1, 2014)    - Remove symbolization of memory, options, and payloads; convert memory, options, and payloads to JSON from YAML.  Migration will perform conversion and adjust tables to be UTF-8.  Recommend making a DB backup before migrating.
 * 0.2 (Nov 6, 2013)    - PeakDetectorAgent now uses `window_duration_in_days` and `min_peak_spacing_in_days`.  Additionally, peaks trigger when the time series rises over the standard deviation multiple, not after it starts to fall.