Revert "Parse put into yaml instead of json"

This reverts commit 621d946.

I put the yaml version in just in case it's needed in future :)

ybd/definitions.py

@@ -64,13 +64,10 @@ def __init__(self, directory='.'):
                 pass
 
         if app.config.get('mode') == 'parse-only':
-            noalias_dumper = yaml.dumper.SafeDumper
-            noalias_dumper.ignore_aliases = lambda self, data: True
             with open(app.config['result-file'], 'w') as f:
-                f.write(yaml.dump(self._definitions,
-                        default_flow_style=False,
-                        Dumper=noalias_dumper))
-            app.log('RESULT', 'Parsed definitions data in yaml format is at',
+                f.write(json.dumps(self._definitions, indent=4,
+                                   sort_keys=True))
+            app.log('RESULT', 'Parsed definitions data in json format is at',
                     app.config['result-file'])
             os._exit(0)