r2.0.2

1. optimize: db index optimize
2. bug fix: raise excepiton when submit ticket with invalide content
3. bug fix: can not login new user
4. bug fix: common user can not be reset password
5. bug fix: user permission(workflowadmin, superadmin, commonuser) is not work
6. bug fix: superadmin can not manage all workflow
7. bug fix: common user can view intervene ticket page
8. bug fix: can not delete role
9. bug fix: ticket search args workflow_id is not work
10. bug fix: new ticket title temple
11. optimize: select workflow before create ticket