Fix doc of REST api task info
Fix doc of REST api task info

Query and list tasks, etc return "processDefinitionId/Url",
"executionId/Url", and "processInstanceId/Url", not the versions
of those without "Id", and "Url" on them.

Also, formKey and category were not in example return values.

stefan-ziel/Activiti,stefan-ziel/Activiti,Activiti/Activiti,Activiti/Activiti,stefan-ziel/Activiti,stefan-ziel/Activiti