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/_templates/globaltoc.html

@@ -0,0 +1,20 @@
+
+<div class="globaltoc">
+
+<ul>
+  <li><a href="{{ pathto('index') }}">index</a></li>
+  <li><a href="{{ pathto('install') }}">install</a></li>
+  <li><a href="{{ pathto('api') }}">high level API</a></li>
+  <li><a href="{{ pathto('lapi') }}">low level API</a></li>
+  <li><a href="{{ pathto('capi') }}">C deltachat.h</a></li>
+</ul>
+<b>external links:</b>
+<ul>
+  <li><a href="https://github.com/deltachat/deltachat-core">github repository</a></li>
+  <!-- <li><a href="https://lists.codespeak.net/postorius/lists/muacrypt.lists.codespeak.net">Mailing list</></li> <-->
+  <li><a href="https://pypi.python.org/pypi/deltachat">pypi: deltachat</a></li>
+</ul>
+
+<b>#deltachat [freenode]</b>
+
+</div>

python/doc/_templates/sidebarintro.html

@@ -0,0 +1 @@
+<h3>deltachat {{release}}</h3>