Fixed some broken docstring references.

platypush/backend/google/fit/__init__.py

@@ -34,7 +34,8 @@ class GoogleFitBackend(Backend):
         """
         :param data_sources: Google Fit data source IDs to monitor. You can
             get a list of the available data sources through the
-            :meth:`platypush.plugins.google.fit.get_data_sources` action
+            :meth:`platypush.plugins.google.fit.GoogleFitPlugin.get_data_sources`
+            action
         :type data_sources: list[str]
 
         :param user_id: Google user ID to track (default: 'me')

platypush/plugins/calendar/ical/__init__.py

@@ -73,7 +73,7 @@ class CalendarIcalPlugin(Plugin, CalendarInterface):
     def get_upcoming_events(self, *_, only_participating=True, **__):
         """
         Get the upcoming events. See
-        :func:`~platypush.plugins.calendar.CalendarPlugin.get_upcoming_events`.
+        :meth:`platypush.plugins.calendar.CalendarPlugin.get_upcoming_events`.
         """
 
         from icalendar import Calendar

platypush/plugins/google/calendar/__init__.py

@@ -49,7 +49,7 @@ class GoogleCalendarPlugin(GooglePlugin, CalendarInterface):
     def get_upcoming_events(self, max_results=10):
         """
         Get the upcoming events. See
-        :func:`~platypush.plugins.calendar.CalendarPlugin.get_upcoming_events`.
+        :meth:`platypush.plugins.calendar.CalendarPlugin.get_upcoming_events`.
         """
 
         now = datetime.datetime.utcnow().isoformat() + 'Z'

platypush/plugins/media/mplayer/__init__.py

@@ -245,7 +245,7 @@ class MediaMplayerPlugin(MediaPlugin):
         """
         Execute a raw MPlayer command. See
         https://www.mplayerhq.hu/DOCS/tech/slave.txt for a reference or call
-        :meth:`platypush.plugins.media.mplayer.list_actions` to get a list
+        :meth:`.list_actions` to get a list
         """
 
         args = args or []

platypush/plugins/sound/__init__.py

@@ -40,11 +40,11 @@ class SoundPlugin(RunnablePlugin):
     ):
         """
         :param input_device: Index or name of the default input device. Use
-            :meth:`platypush.plugins.sound.query_devices` to get the
-            available devices. Default: system default
+            :meth:`.query_devices` to get the available devices. Default: system
+            default
         :param output_device: Index or name of the default output device.
-            Use :meth:`platypush.plugins.sound.query_devices` to get the
-            available devices. Default: system default
+            Use :meth:`.query_devices` to get the available devices. Default:
+            system default
         :param input_blocksize: Blocksize to be applied to the input device.
             Try to increase this value if you get input overflow errors while
             recording. Default: 1024
@@ -160,8 +160,7 @@ class SoundPlugin(RunnablePlugin):
             in the audio file in file mode, 1 if in synth mode
         :param volume: Playback volume, between 0 and 100. Default: 100.
         :param stream_index: If specified, play to an already active stream
-            index (you can get them through
-            :meth:`platypush.plugins.sound.query_streams`). Default:
+            index (you can get them through :meth:`.query_streams`). Default:
             creates a new audio stream through PortAudio.
         :param stream_name: Name of the stream to play to. If set, the sound
             will be played to the specified stream name, or a stream with that