copyright: update year to 2013

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
core: fix trivial whitespace/tab styling issues

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>
pom.xml: don't fail the build for duplicated resources

For now, ignore the duplicate classes issues around org.w3c.* and
org.xml.*. We should find a way to clean them up though eventually.

Signed-off-by: Pierre-Alexandre Meyer <pierre@ning.com>