Added support for TaskObserver's failed and cancelled methods
Added support for cancelled() and failed() to task observers
Added TaskObserver's cancelled() and failed() support to CommandHandler
Fixed issue with App Manager -- http://code.cytoscape.org/redmine/issues/2089
Updated work-swing-impl's task managers to TaskObserve's FinishStatus
Updated work-impl to TaskObserver's FinishStatus
Updated command-dialog-impl to reflect changes to TaskObserver's FinishStatus
Merge branch 'develop' of https://github.com/cytoscape/cytoscape-impl into develop