Merge branch '321-docs-py3'

closes #321

.travis.yml

@@ -31,5 +31,9 @@ matrix:
     - python: 3.6
       script: tox -e flake8less
       env: FLAKE8
+    - python: 3.7
+      dist: xenial
+      script: tox -e docs
+      env: DOCS
   allow_failures:
     - python: nightly

docs/conf.py

@@ -64,6 +64,8 @@ def _get_versions():
     parent = os.path.dirname(here)
     v = subprocess.check_output([sys.executable, "setup.py", "--version"],
                                 cwd=parent)
+    if sys.version_info[0] >= 3:
+        v = v.decode()
     short = ".".join(v.split(".")[:2])
     long = v
     return short, long

tox.ini

@@ -44,3 +44,11 @@ max-complexity = 40
 [testenv:flake8less]
 deps = flake8
 commands = flake8 --select=E901,E999,F821,F822,F823 src/wormhole
+
+[testenv:docs]
+deps =
+     sphinx
+     recommonmark
+skip_install = True
+commands =
+         sphinx-build -b html -d {toxinidir}/docs/_build/doctrees {toxinidir}/docs {toxinidir}/docs/_build/html