Set version to 3.1.0.M1.

build.gradle

@@ -1,7 +1,7 @@
 apply plugin: 'base'
 
 allprojects {
-    version = '3.1.0.CI-SNAPSHOT'
+    version = '3.1.0.M1'
     releaseBuild = version.endsWith('RELEASE')
     snapshotBuild = version.endsWith('SNAPSHOT')
 

docs/manual/src/docbook/springsecurity.xml

@@ -13,7 +13,7 @@
             </author>
         </authorgroup>
         <productname>Spring Security</productname>
-        <releaseinfo>3.1.0-DRAFT</releaseinfo>
+        <releaseinfo>3.1.0.M1</releaseinfo>
     </info>
     <toc/>
     <preface xml:id="preface">