maven-nar-plugin replaces freehep-nar-plugin

[Stephen Bannasch]

Were not using a nar plugin now but there's been recent work on this one:

repo: http://github.com/duns/maven-nar-plugin,
doc: http://duns.github.com/maven-nar-plugin/
mvn snapshot repo: http://duns.github.com/maven-snapshots/
sonatypes issue tracker: https://issues.sonatype.org/browse/NAR

Issue with fix for swig customization:
Configuring nar stage of swig plugin
https://issues.sonatype.org/browse/NAR-151