[#4648] remove sample hooks; pre-rebase.sample appears to be copyrighted
Apply Apache License 2.0 header where necessary

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>
Add LICENSE entries for jquery.maxlength.min.js and spin.min.js

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>
Add Apache Ant buildfile for use with Apache Rat

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>
[#4648] Add missing license headers

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>
[#4648] Adjust rat-excludes to handle all possible git repos

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>
[#4648] Add NOTICE file in top directory

Signed-off-by: Peter Hartmann <peterhartmann@apache.org>