Added exporting of variables from task + association support
ACT-1479 fix

ACT-1749 Impossible to remove identity-links from create-listener
http://jira.codehaus.org/browse/ACT-1749
Merge pull request #153 from martin-grofcik/activiti-5.14.1-SNAPSHOT

ACT-1479 fix
Added custom parameter map to WorkflowDefinition and StepDefinition