Update POM for latest Maven Central publishing hoops.

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.samskivert</groupId>
   <artifactId>depot</artifactId>
@@ -157,15 +152,13 @@
       </plugin>
 
       <plugin>
-        <groupId>org.sonatype.plugins</groupId>
-        <artifactId>nexus-staging-maven-plugin</artifactId>
-        <version>1.6.13</version>
+        <groupId>org.sonatype.central</groupId>
+        <artifactId>central-publishing-maven-plugin</artifactId>
+        <version>0.8.0</version>
         <extensions>true</extensions>
-        <inherited>false</inherited>
         <configuration>
-          <serverId>ossrh-releases</serverId>
-          <nexusUrl>https://oss.sonatype.org/</nexusUrl>
-          <stagingProfileId>aaa740f9c5c260</stagingProfileId>
+          <publishingServerId>central</publishingServerId>
+          <autoPublish>true</autoPublish>
         </configuration>
       </plugin>
     </plugins>
@@ -214,12 +207,38 @@
     </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>