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

ci_scripts/ci_upload.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+
+if [ -z "$DEVPI_LOGIN" ] ; then 
+    echo "required: password for 'dc' user on https://m.devpi/net/dc index"
+    exit 1
+fi
+
+set -xe
+
+#DOXYDOCDIR=${1:?directory where doxygen docs to be found}
+PYDOCDIR=${1:?directory with python docs}
+WHEELHOUSEDIR=${2:?directory with pre-built wheels}
+
+export BRANCH=${CIRCLE_BRANCH:?specify branch for uploading purposes}
+
+
+# python docs to py.delta.chat
+rsync -avz \
+  -e "ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null" \
+  "$PYDOCDIR/html/" \
+  delta@py.delta.chat:build/${BRANCH}
+
+# C docs to c.delta.chat
+#rsync -avz \
+#  -e "ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null" \
+#  "$DOXYDOCDIR/html/" \
+#  delta@py.delta.chat:build-c/${BRANCH}
+
+echo -----------------------
+echo upload wheels 
+echo -----------------------
+
+# Bundle external shared libraries into the wheels
+pushd $WHEELHOUSEDIR
+
+pip install devpi-client
+devpi use https://m.devpi.net
+devpi login dc --password $DEVPI_LOGIN
+
+devpi use dc/$BRANCH || {
+    devpi index -c $BRANCH 
+    devpi use dc/$BRANCH
+}
+devpi index $BRANCH bases=/root/pypi
+devpi upload deltachat*.whl
+
+popd