Merge pull request #1 from Activiti/master

Merging
Fix JSON to BPMN model conversion issue
Fix JSON to BPMN model conversion issue
Create messages_tr.properties

Turkish translation of messages.properties
use BusinessCalendarManager instead of create a new instance each time
Clone methods for Designer
Merge branch 'master' of https://github.com/Activiti/Activiti
Merge pull request #167 from cornetto/master

Turkish translation of messages.properties
Merge pull request #168 from xuhuisheng/ACT-1833

use BusinessCalendarManager instead of create a new instance each time
Merge pull request #161 from balsarori/json_converter

Fix #160
Merge remote-tracking branch 'upstream/master'