[oozie] Disable drop targets around widget
[oozie] Just regular nodes can be moved
[oozie] Support for loading N-nested forks
[oozie] Convert to decision removes the join node
[oozie] Disabled drop after decision node
[oozie] Kill widget should not be movable
[oozie] Join widget should not be movable
[oozie] Support for basic Decision node

Support adding node to decision
Provide condition to jump
Unlink from the delete Join
Support deleting a decision node with a single node
[oozie] Generate XML of Decision node

Also support dropping / moving a node into a Decision
[oozie] Add link to HDFS workspace
[oozie] Use select box to list the OK and KO transitions
[oozie] Add End node to the end in order to submit workflow
[oozie] Fix action linking by not removing the Kill node from the list
Merge remote-tracking branch 'remotes/origin/oozie2' into oozie2