added basic documentation with pyscaffold and tox. A lot of it is probably wrong.

tests/conftest.py

@@ -0,0 +1,10 @@
+"""
+    Dummy conftest.py for meshctrl.
+
+    If you don't know what this is for, just leave it empty.
+    Read more about conftest.py under:
+    - https://docs.pytest.org/en/stable/fixture.html
+    - https://docs.pytest.org/en/stable/writing_plugins.html
+"""
+
+# import pytest