Update/check copyright headers

Use something like the Maven License plugin - http://code.google.com/p/maven-license-plugin/ - to check/set the copyright folders of all source code in Scufl2 (Except the uk.org.taverna.scul2.ucfpackage.impl.odfdom package which have existing copyright notices)

(For now I assume the license for Scufl2 is LGPL 2.1 like with the rest of Taverna - although something like the Apache License v2 might be more appropriate to allow maximum usage..?)