Automatically build source archive in package phase.

project-assembly.xml

@@ -0,0 +1,24 @@
+<assembly
+    xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.0
+    http://maven.apache.org/xsd/assembly-1.1.0.xsd">
+
+    <id>project</id>
+    <formats>
+        <format>tar.gz</format>
+    </formats>
+
+    <fileSets>
+        <fileSet>
+            <directory>${project.basedir}</directory>
+            <outputDirectory>/</outputDirectory>
+            <useDefaultExcludes>true</useDefaultExcludes>
+            <excludes>
+                <exclude>**/*.log</exclude>
+                <exclude>**/${project.build.directory}/**</exclude>
+            </excludes>
+        </fileSet>
+    </fileSets>
+
+</assembly>