use new-style tox.ini, add flake8-docstrings, add docstrings

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py37,artifacts
+envlist = py37,lint
 
 [testenv]
 # build a wheel and test it
@@ -13,6 +13,7 @@ wheel_build_env = build
 
 deps =
     flake8
+    flake8-docstrings
     pytest
     pytest-cov
 commands =
@@ -26,20 +27,38 @@ whitelist_externals = ln
 # require setuptools when building
 deps = setuptools
 
-[testenv:artifacts]
+[testenv:py37]
+# run pytest and coverage
 deps =
-skip_install = true
+    coverage
+    pytest
+    pytest-cov
 commands =
+    pytest --cov={envsitepackagesdir}/incorporealcms/ --cov-report=
+    coverage report -m --fail-under=80
     ln -sf {distdir} dist
 
+[testenv:lint]
+# run style checks
+skip_install = true
+deps =
+    flake8
+    flake8-docstrings
+commands =
+    flake8
+    - flake8 --disable-noqa --select=E,W,F,C,D
+
 [flake8]
 max-line-length = 120
-exclude = .tox/,versioneer.py,_version.py
-max-complexity = 5
+exclude =
+    .tox/
+    versioneer.py
+    _version.py
+    instance/
+max-complexity = 10
 
 [pytest]
 python_files = tests.py test_*.py
-addopts = --cov-report=term --cov-report=term-missing
 
 [coverage:run]
 branch = True