Reorganized vendored micropython libraries

libs/README.md

@@ -0,0 +1,9 @@
+# Vendored MicroPyton libraries
+
+This directory contains some libraries that are required by examples and unit
+tests.
+
+All libraries except `utemplate` were copied from the
+[micropython-lib](https://github.com/micropython/micropython-lib) project. See
+the README file in the `common/utemplate` subdirectory for details about this
+library.

run_tests.py

@@ -1,7 +1,8 @@
 import sys
 
 sys.path.insert(0, 'src')
-sys.path.insert(2, 'tests/libs')
+sys.path.insert(2, 'libs/common')
+sys.path.insert(3, 'libs/micropython')
 
 import unittest
 

tox.ini

@@ -19,6 +19,8 @@ commands=
 deps=
     pytest
     pytest-cov
+setenv=
+    PYTHONPATH=libs/common
 
 [testenv:flake8]
 deps=