Merge pull request #37 from abaxter-rh4u/master

JMS work so far
Added documentation for TaskService.java from WS-HumanTask_v1.pdf
removed unused import in XmlUtil.java
Merge pull request #39 from abaxter-rh4u/master

Allow for null responses from commands that give them
Merge pull request #38 from mdanter/master

Added documentation for TaskService.java from WS-HumanTask_v1.pdf