update build to Eclipse Tycho 0.16

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.documentation/pom.xml b/org.eclipse.vex.documentation/pom.xml
index 08981b0..d841fcc 100644
--- a/org.eclipse.vex.documentation/pom.xml
+++ b/org.eclipse.vex.documentation/pom.xml
@@ -4,7 +4,6 @@
 	<modelVersion>4.0.0</modelVersion>
 	<artifactId>org.eclipse.vex.documentation</artifactId>
 	<packaging>eclipse-plugin</packaging>
-	<version>1.1.0-SNAPSHOT</version>
 	<name>Vex Documentation</name>
 
 	<parent>
@@ -15,32 +14,23 @@
 	</parent>
 
 	<build>
-		<pluginManagement>
-			<plugins>
-				<plugin>
-					<groupId>org.apache.maven.plugins</groupId>
-					<artifactId>maven-antrun-plugin</artifactId>
-					<version>1.4</version>
-				</plugin>
-			</plugins>
-		</pluginManagement>
-
 		<plugins>
 			<plugin>
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-antrun-plugin</artifactId>
+				<version>1.7</version>
 				<executions>
 					<execution>
 						<id>mylyn-wiki-text</id>
 						<phase>generate-sources</phase>
-						<goals>
-							<goal>run</goal>
-						</goals>
 						<configuration>
 							<tasks>
 								<ant antfile="buildHelp.xml" inheritRefs="true" />
 							</tasks>
 						</configuration>
+						<goals>
+							<goal>run</goal>
+						</goals>
 					</execution>
 				</executions>
 			</plugin>