update docs and add a simple manual script to run python/rust tests

python/install_python_bindings.py

@@ -25,6 +25,7 @@ if __name__ == "__main__":
     ])
     subprocess.check_call("rm -rf build/ src/deltachat/*.so" , shell=True)
 
-    subprocess.check_call([
-        sys.executable, "-m", "pip", "install", "-e", "."
-    ])
+    if len(sys.argv) > 1 and sys.argv[1] != "onlybuild":
+        subprocess.check_call([
+            sys.executable, "-m", "pip", "install", "-e", "."
+        ])

python/tox.ini

@@ -34,7 +34,6 @@ deps = auditwheel
 commands = 
     python tests/auditwheels.py {toxworkdir}/wheelhouse
 
-
 [testenv:lint]
 skipsdist = True
 usedevelop = True
@@ -49,14 +48,25 @@ commands =
     rst-lint --encoding 'utf-8' README.rst
 
 [testenv:doc]
-basepython = python3.5
+skipsdist = True
+usedevelop = True
 deps =
     sphinx==2.2.0
     breathe
-
-changedir = doc
 commands =
-    sphinx-build -w docker-toxdoc-warnings.log -b html . _build/html
+    sphinx-build -w toxdoc-warnings.log -b html doc doc/_build/html
+
+
+[testenv:lintdoc]
+skipsdist = True
+usedevelop = True
+deps =
+    {[testenv:lint]deps}
+    {[testenv:doc]deps}
+commands =
+    {[testenv:lint]commands}
+    {[testenv:doc]commands}
+
 
 
 [pytest]