removed redundant dependency and added needed ones

other clean up in pom

pom.xml

@@ -135,6 +135,11 @@
             <artifactId>maven-project</artifactId>
             <version>2.0.9</version>
         </dependency>
+        <dependency>
+            <groupId>org.apache.maven</groupId>
+            <artifactId>maven-core</artifactId>
+            <version>2.0.9</version>
+        </dependency>
         <dependency>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-dependency-plugin</artifactId>
@@ -145,6 +150,21 @@
             <artifactId>plexus-utils</artifactId>
             <version>1.5.8</version>
         </dependency>
+        <dependency>
+            <groupId>org.codehaus.plexus</groupId>
+            <artifactId>plexus-archiver</artifactId>
+            <version>1.0-alpha-9</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.plexus</groupId>
+            <artifactId>plexus-container-default</artifactId>
+            <version>1.0-alpha-9-stable-1</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.plexus</groupId>
+            <artifactId>plexus-component-api</artifactId>
+            <version>1.0-alpha-15</version>
+        </dependency>
         <dependency>
             <groupId>commons-jxpath</groupId>
             <artifactId>commons-jxpath</artifactId>
@@ -165,13 +185,48 @@
             <artifactId>commons-lang</artifactId>
             <version>2.4</version>
         </dependency>
-        <dependency>
-            <groupId>commons-io</groupId>
-            <artifactId>commons-io</artifactId>
-            <version>1.4</version>
-        </dependency>
     </dependencies>
     <build>
+        <pluginManagement>
+            <plugins>
+                <plugin>
+                    <artifactId>maven-compiler-plugin</artifactId>
+                    <version>2.0.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-deploy-plugin</artifactId>
+                    <version>2.4</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-gpg-plugin</artifactId>
+                    <version>1.0-alpha-4</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>2.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-javadoc-plugin</artifactId>
+                    <version>2.6.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-plugin-plugin</artifactId>
+                    <version>2.5.1</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-release-plugin</artifactId>
+                    <version>2.0-beta-9</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-scm-plugin</artifactId>
+                    <version>1.2</version>
+                </plugin>
+                <plugin>
+                    <artifactId>maven-source-plugin</artifactId>
+                    <version>2.1.1</version>
+                </plugin>
+            </plugins>
+        </pluginManagement>
         <plugins>
             <plugin>
                 <artifactId>maven-scm-plugin</artifactId>
@@ -182,23 +237,20 @@
             </plugin>
             <plugin>
                 <artifactId>maven-release-plugin</artifactId>
-                <version>2.0-beta-9</version>
                 <configuration>
                     <autoVersionSubmodules>true</autoVersionSubmodules>
                     <useReleaseProfile>false</useReleaseProfile>
                     <arguments>-Pofficial-release</arguments>
                 </configuration>
             </plugin>
             <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
                     <source>1.5</source>
                     <target>1.5</target>
                 </configuration>
             </plugin>
             <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-jar-plugin</artifactId>
                 <configuration>
                     <archive>
@@ -208,7 +260,6 @@
                         </manifestEntries>
                     </archive>
                 </configuration>
-                <version>2.2</version>
             </plugin>
             <plugin>
                 <artifactId>maven-plugin-plugin</artifactId>
@@ -249,7 +300,6 @@
                 <plugins>
                     <!-- We want to sign the artifact, the POM, and all attached artifacts -->
                     <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-gpg-plugin</artifactId>
                         <configuration>
                             <useAgent>true</useAgent>
@@ -267,14 +317,12 @@
                     <!-- We want to deploy the artifact to a staging location for perusal -->
                     <plugin>
                         <inherited>true</inherited>
-                        <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-deploy-plugin</artifactId>
                         <configuration>
                             <updateReleaseInfo>true</updateReleaseInfo>
                         </configuration>
                     </plugin>
                     <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-source-plugin</artifactId>
                         <executions>
                             <execution>
@@ -286,7 +334,6 @@
                         </executions>
                     </plugin>
                     <plugin>
-                        <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
                         <configuration>
                             <encoding>${project.build.sourceEncoding}</encoding>