Convert to new Sonatype publishing bits.

pom.xml

@@ -1,11 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
-  <parent>
-    <groupId>org.sonatype.oss</groupId>
-    <artifactId>oss-parent</artifactId>
-    <version>7</version>
-  </parent>
 
   <groupId>com.threerings</groupId>
   <artifactId>narya-parent</artifactId>
@@ -109,6 +104,17 @@
           <artifactId>maven-deploy-plugin</artifactId>
           <version>2.5</version>
         </plugin>
+
+        <plugin>
+          <groupId>org.sonatype.central</groupId>
+          <artifactId>central-publishing-maven-plugin</artifactId>
+          <version>0.8.0</version>
+          <extensions>true</extensions>
+          <configuration>
+            <publishingServerId>central</publishingServerId>
+            <autoPublish>true</autoPublish>
+          </configuration>
+        </plugin>
       </plugins>
     </pluginManagement>
   </build>
@@ -163,12 +169,38 @@
     </profile>
 
     <profile>
-      <id>release-sign-artifacts</id>
+      <id>release-extras</id>
       <activation>
         <property><name>performRelease</name><value>true</value></property>
       </activation>
       <build>
         <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-source-plugin</artifactId>
+            <version>2.1.2</version>
+            <executions>
+              <execution>
+                <id>attach-sources</id>
+                <goals>
+                  <goal>jar-no-fork</goal>
+                </goals>
+              </execution>
+            </executions>
+          </plugin>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-javadoc-plugin</artifactId>
+            <version>2.9.1</version>
+            <executions>
+              <execution>
+                <id>attach-javadocs</id>
+                <goals>
+                  <goal>jar</goal>
+                </goals>
+              </execution>
+            </executions>
+          </plugin>
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>