Skip node if node fails to load.
Error message needs work.
Add *unsigned* version of jhall-2.0.jar
Version on http://download.java.net/maven/2/com/sun/woodstock/dependlibs/jhall/2.0/
is already signed and signed incorrectly.
See http://davidbomba.com/index.php/2013/05/15/unsign-resign-and-update-jar-manfests/ for instructions on unsigning jar files.