Fixes issue # 168 in metafacture-core

Updated the maven-assembly-plugin to stop it from creating invalid tar
files which lead 7zip to output warning messsages.

Author: cboehme

pom.xml

@@ -159,7 +159,23 @@
 
 			<plugin>
 				<artifactId>maven-assembly-plugin</artifactId>
-				<version>2.2.1</version>
+				<version>2.4</version>
+				<dependencies>
+					<!-- Pin the versions of plexus-archiver and plexus-io as 
+					     there are apparently two bugs in the versions on which 
+					     maven-assembly-plugin depends on by default. See 
+					     http://www.misanthropicgeek.net/?p=1303 for details. -->
+					<dependency>
+						<groupId>org.codehaus.plexus</groupId>
+						<artifactId>plexus-archiver</artifactId>
+						<version>2.4.3</version>
+					</dependency>
+					<dependency>
+						<groupId>org.codehaus.plexus</groupId>
+						<artifactId>plexus-io</artifactId>
+						<version>2.0.8</version>
+					</dependency>
+				</dependencies>
 				<executions>
 					<execution>
 						<id>create-distribution-package</id>