Added task manager that responds to tasks mentioned in SVN logs.

The task manager doesn't do anything yet, it just logs the fact that a
task has been mentioned.

attract_server/task_manager.py

@@ -0,0 +1,21 @@
+"""Task management."""
+
+import attr
+
+from . import attrs_extra
+
+
+@attr.s
+class TaskManager(object):
+    _log = attrs_extra.log('%s.TaskManager' % __name__)
+
+    def task_logged_in_svn(self, sender, task_id, log_entry):
+        """Blinker signal receiver; connects the logged commit with the task.
+
+        :param sender: sender of the signal
+        :type sender: attract_server.subversion.CommitLogObserver
+        :param task_info: {'task_id': '123', 'log_entry': LogEntry} dict.
+        :type task_info: dict
+        """
+
+        self._log.info("Task '%s' logged in SVN: %s", task_id, log_entry)