Merge branch 'master' of https://github.com/Activiti/Activiti
fix act-1082
add test case for act-1082
some steps of act-1560
ACT-1663: FormKey in StartEvent
ACT-1663: Test FIX
act-1560
update userguide for delete taskListerEvent
ACT-1722: Attribute isExecutable in ActivitiModeler.
fix act-1695
update testcase to check the ID of variable is fixed after chaning its type
sample implementation of ACT-1738
Upgrade to commons-lang3. See http://commons.apache.org/proper/commons-lang/
try to add test case for MDC. Not working yet
complete implementation of ACT-1738
Merge remote-tracking branch 'upstream/master' into act-1738
add files for act-1738
add files for act-1738
add comments
update userguide