Added new notification when a blink session is created

blink/sessions.py

@@ -423,6 +423,8 @@ class BlinkSession(QObject):
     def __init__(self):
         super(BlinkSession, self).__init__()
         self._initialize()
+        notification_center = NotificationCenter()
+        notification_center.post_notification('BlinkSessionWasCreated', sender=self)
 
     def _initialize(self, reinitialize=False):
         if not reinitialize:
@@ -3539,6 +3541,9 @@ class BlinkFileTransfer(object):
         self._uri = None
         self._stat = None
 
+        notification_center = NotificationCenter()
+        notification_center.post_notification('BlinkFileTransferWasCreated', sender=self)
+
     def __getstate__(self):
         # duplicate the selector, we cannot serialize the fd
         file_selector = FileSelector(name=self.file_selector.name, type=self.file_selector.type, size=self.file_selector.size, hash=self.file_selector.hash)