Added baseline for sphinx documentation and on2FACode event

The docs are still very WIP, but they should be functional. Just
execute `make html` in the docs folder, and you should be able to
navigate to `/docs/_build/html` and view it in your browser

docs/intro.rst

@@ -0,0 +1,86 @@
+.. highlight:: python
+.. _intro:
+
+Introduction
+============
+
+.. todo::
+    Make a general introduction to `fbchat`
+
+
+.. _intro_logging_in:
+
+Logging in
+----------
+
+.. todo::
+    Write something about logging in, logging out, checking login, 2FA and the event `on2FACode`, here
+
+
+.. _intro_sessions:
+
+Sessions
+--------
+
+.. todo::
+    Make an introduction to and show example usage of sessions
+
+
+.. _intro_sending:
+
+Sending messages
+----------------
+
+.. todo::
+    Make an introduction to and show example usage of how you send information
+
+.. literalinclude:: ../examples/send.py
+    :language: python
+
+
+.. _intro_fetching:
+
+Fetching information
+--------------------
+
+.. todo::
+    Make an introduction to and show example usage of fetching information
+
+.. literalinclude:: ../examples/get.py
+    :language: python
+
+
+.. _intro_thread_id:
+
+Thread ids
+----------
+
+.. todo::
+    Make an introduction to and show example usage of thread ids
+
+
+.. _intro_thread_type:
+
+Thread types
+------------
+
+.. todo::
+    Make an introduction to and show example usage of thread types
+
+
+.. _intro_message_ids:
+
+Message ids
+-----------
+
+.. todo::
+    Make an introduction to and show example usage of message ids
+
+
+.. _intro_events:
+
+Events
+------
+
+.. todo::
+    Make an introduction to and show example usage of the event system