Add missing NOTICE.txt files and update copyright year to 2021

git-svn-id: https://svn.apache.org/repos/asf/turbine/fulcrum/trunk/upload@1890170 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: be1f8aae968fcc1ab526746c31aa5ad374eade27
  1. src/
  2. xdocs/
  3. LICENSE.txt
  4. NOTICE.txt
  5. pom.xml