Change to extend RTE not ant exception
Add utility method
Add node context data, enhance context builder
Add failure information for handler steps
Update bundled plugin implementations
fix .gitignore for build and .gradle
Fix makefile bug: plugins built multiple times
Add documentation for error handler context data
Add LocalExec plugin
Cleanup: Remove some checked exceptions

consolidate FailureReasons into top-level classes
Move Codec classes to package
Cleanup of Exception usage and WF step results

improve step result and failure collection

remove unnecessary use of exceptions
Update examples
Cleanup toString and result collection
Add StepException throws clause to StepExecutor
Add Job reference execution step failure reasons
Update docs: reason codes for job reference failures
Merge branch 'feature/handler-context-248' into development

for #248
Add missing pom
Update new workflow step gui