chore(addToLane/boxing): Remove unnecessary line

related to CAM-1360
Merge branch 'master' of github.com:camunda/camunda-modeler
test(start-event-add): fix test case
docs(contributing.md): How to synch master-kepler

describe how to synchronize master and kepler branch
chore(element/delete): Update BPMN 2.0 XML

- after an element has been deleted the BPMN 2.0 XML will be updated, too.

related to CAM-1383
feat(datastore/dataobject/mappingTable): Add mapping table for datastores
and dataobjects

- all datastores are shown in a mapping table on the definition tab of the
  properties panel
- all dataobjects are shown in a mapping table on the general tab of the
properties panel
- it is possible to add and remove a datastore/dataobject
- a confirmation dialog is shown for deletion

related to #CAM-1363
feat(loop/prop): Add checkbox to set standard loop on properties panel

- add standard loop flag with note that this feature is not supported from the
  camunda BPM engine in multi instance tab
- only once is possible: multi instance or standard loop

related to #CAM-280
feat(throwing message event/prop): Empty event tab for throwing message
events.

- Show an empty event tab for throwing message events because the camunda
  BPM engine doesn't support that.

related to #CAM-1368
impr(callact): set "+" marker & expanded=false

- add "+" marker to call activity
- set expanded=false to true

related to #CAM-686
Merge branch 'master' of github.com:camunda/camunda-modeler
feat(signal/prop): Add async flag to signal throwing event and signal end
event.

- it is possible to configure asynchronous continuation for a signal
  throwing event and signal end event on the properties panel.

related to #CAM-1378
chore(pref): remove dead code
Merge branch 'master' of github.com:camunda/camunda-modeler
fix(callactivity/validation): Hide validation error.

- when called element binding value is not 'version', don't show
  validation error for called element version field on properties panel

related to #CAM-1369
fix(dataObjects): Fix moving of data object refs

- if a diagram is a collaboration, then you are not able to move a data
  object references outside a pool
- furthermore, dependent of the scope of a data object it is not possible
  to move a data object reference outside the scope (for example from one
  pool to another pool)
- if data object will be removed, then all data object references, which
  have a reference to this data object, will be deleted to to be conform
  with BPMN 2.0 specification (see section 10.3.1, figure 10.51, page 205)

related to CAM-1379, CAM-1363
Merge branch 'master' of github.com:camunda/camunda-modeler
chore(msgThrowEvent): Show empty event tab

- an empty event tab will be shown for message throw events

related to CAM-1368
test(functional): Add latest Jubula test suite

add Jubula test suite for modeler version 2.1
feat(compensateThrowingEvent/prop): Add event tab fields for intermediate
throwing compensation event.

- it is possible to configure intermediate throwing compensation event on
  event tab
- set default value "true" for "wait for completion" attribute
- add test cases for method getFlowElementsContainer

related to #CAM-1392
Merge branch 'master' of github.com:camunda/camunda-modeler