Add change log entry and bump protocol version.

CHANGELOG.md

@@ -5,6 +5,7 @@
      server descriptor doesn't contain such a summary anymore.
    - Remove optional fields "countries", "transports", and "versions"
      from clients objects which were still labeled as beta.
+   - Add new "version" parameter to filter for Tor version.
 
 
 # Changes in version 4.0-1.3.0 - 2017-08-04

build.xml

@@ -8,7 +8,7 @@
 
   <property name="javadoc-title" value="Onionoo API Documentation"/>
   <property name="implementation-title" value="Onionoo" />
-  <property name="onionoo.protocol.version" value="4.0"/>
+  <property name="onionoo.protocol.version" value="4.1"/>
   <property name="release.version"
             value="${onionoo.protocol.version}-1.3.0-dev"/>
   <property name="metricslibversion" value="2.0.0"/>