Folding in Railo 3/4 NULL support per https://groups.google.com/d/msg/transfer-dev/xkAux83LIg0/XxL57mriI34J
Wrapping AOP fireEvent() in a silent try/catch to silence spurious errors under load where object is gone before an after observer fires.
Updating README and bumping version number to 1.3 in preparation to merge into master for a patch release.