[MNGSITE-152]
 - Added appropriate links to download site and license location
   to fulfill the ASF requirements.


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-assembly-plugin@1593809 13f79535-47bb-0310-9956-ffa450edef68
[MNGSITE-152]
 - Added missing download.cgi and xdoc/download.xml.vm


git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-assembly-plugin@1594666 13f79535-47bb-0310-9956-ffa450edef68
added license header

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-assembly-plugin@1595624 13f79535-47bb-0310-9956-ffa450edef68
- Cleaned up imports in class files.

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk/maven-assembly-plugin@1601216 13f79535-47bb-0310-9956-ffa450edef68