Merge branch '109-close-label-provider' into 'master'

Resolve "close label provider"

Closes #109

See merge request troebs/pycs!101

pycs/projects/ProjectManager.py

@@ -75,6 +75,8 @@ class ProjectManager(ObservableDict):
             for label in provider.get_labels():
                 self[uuid].add_label(label['name'], identifier=label['id'])
 
+            provider.close()
+
         # create project.json
         self.write_project(uuid)