Create a migration guide from 0.6.x to 0.7.x

Author: morguldir

docs/index.rst

@@ -13,5 +13,6 @@ Indices and tables
     playlist
     api
     history
+    migration
     genindex
     py-modindex

docs/migration.rst

@@ -0,0 +1,19 @@
+
+Migration guides
+================
+
+
+Migrating from 0.6.x -> 0.7.x
+-----------------------------
+
+This update added a lot more docstrings to functions, added pagination to most functions,
+and it uses methods a lot more over functions that take id's, for example ``session.get_album_tracks(108064429)``
+is now ``session.album(108064429).tracks()`` instead
+
+Additionally a few of the pages have been deprecated on TIDAL's side and aren't being updated anymore, this applies to genres
+and moods mostly, so see :ref:`pages` for how to find these at their new homes, but note that you will probably need to search
+
+Searching will be a bit more robust now, since you pass actual types,
+instead of keywords matching the types. See :class:`~tidalapi.session.Session.search` for details
+
+Also generally instead of things like ``session.get_track(track_id)``, you will now use session.track(track_id)