RAT-203: Replace licence by license

* Use license in documentation, javadoc and comments to not confuse users.
* TODO: Rename classes after this commit.
* Deprecated CLI option appendLicence will remain active,
  works like appendLicense.


git-svn-id: https://svn.apache.org/repos/asf/creadur/rat/trunk@1681534 13f79535-47bb-0310-9956-ffa450edef68
17 files changed