nar-dependencies.xml: add missing eof newline
Add NOTICE regarding code from Ant Contrib project
CCTask: remove invalid information

The licensing is now explained in NOTICE.md. The installation
instructions are also obsolete, since the NAR version of the
cpptasks functionality is not intended for standalone use.
Remove incorrect license headers

The NAR plugin for Maven is not an Apache Software Foundation project.

See next commit for addition of the proper license headers.
Remove more incorrect license headers

The NAR plugin for Maven is not part of the Ant-Contrib effort,
although a significant portion of its code was adapted from
Ant-Contrib's cpptasks component. See the NOTICE.md for details.
POM: add license-maven-plugin configuration

This allows easy generation and maintainence of proper license headers.
Add the proper license headers

This was done using the license-maven-plugin:

    mvn license:update-file-header
Add project license

This was done using the license-maven-plugin:

    mvn license:update-project-license
Update it0013's GNU-style COPYING file
Fix XML header lines
Merge pull request #120 from maven-nar/cleanup-licensing

Clean up licensing