feat: bring back and adapt python bindings with rust core

* import python, try to adapt for rust

* add missing wrapper functions

* - try to write up how to build python bindings
- strike some unused functions from deltachat.h

* adjustments to make tox work

* try to run circle-ci with python build

* don't do docs

* running cargo test as well

* don't run cargo test anymore, that's done in other ci jobs

* also build docs

* don't run doxygen anymore

* subst C with Rust

* a try to get better wheels

Closes #41

python/doc/api.rst

@@ -0,0 +1,54 @@
+
+high level API reference
+========================
+
+.. note::
+
+    This API is work in progress and may change in versions prior to 1.0.
+
+- :class:`deltachat.account.Account` (your main entry point, creates the
+  other classes)
+- :class:`deltachat.chatting.Contact`
+- :class:`deltachat.chatting.Chat`
+- :class:`deltachat.message.Message`
+- :class:`deltachat.message.MessageType`
+- :class:`deltachat.message.MessageState`
+
+Account
+-------
+
+.. autoclass:: deltachat.account.Account
+    :members:
+
+
+Contact
+-------
+
+.. autoclass:: deltachat.chatting.Contact
+    :members:
+
+Chat
+----
+
+.. autoclass:: deltachat.chatting.Chat
+    :members:
+
+Message
+-------
+
+.. autoclass:: deltachat.message.Message
+    :members:
+
+MessageType
+------------
+
+.. autoclass:: deltachat.message.MessageType
+    :members:
+
+MessageState
+------------
+
+.. autoclass:: deltachat.message.MessageState
+    :members:
+
+