fixed bug where title and description elements weren't being written. updated ex_02.py to include title and description on indicator

Author: Bryan Worrell

examples/ex_02.py

@@ -22,6 +22,8 @@ def main():
     f.add_hash(h)
 
     indicator = Indicator()
+    indicator.title = "File Hash Example"
+    indicator.description = "An indicator containing a File observable with an associated hash"
     indicator.set_producer_identity("The MITRE Corporation")
     indicator.set_produced_time(datetime.now())
     indicator.add_object(f)

stix/indicator/indicator.py

@@ -138,7 +138,11 @@ def to_obj(self, return_obj=None):
         if self.id_:
             return_obj.set_id(self.id_)
 
-        '''most of this does not work because of the state of the cybox api development'''
+        if self.description:
+            return_obj.set_Description(self.description.to_obj())
+        
+        return_obj.set_Title(self.title)
+
         if self.observables:
             if len(self.observables) > 1:
                 root_observable = self._merge_observables(self.observables)