tox.ini fixes

- use python3 for all tests
- generate coverage reports

Author: larsks

test-requirements.txt

@@ -1,3 +1,4 @@
+coverage
 pytest
 flake8
 pytest-cov

tox.ini

@@ -4,6 +4,7 @@ envlist = pep8,py3
 skipsdist = True
 
 [testenv]
+basepython = python3
 usedevelop = True
 whitelist_externals =
     bash
@@ -22,10 +23,9 @@ passenv =
 [testenv:py3]
 commands =
     {[testenv]commands}
-    py.test {posargs}
+    py.test --cov=noggin {posargs}
 
 [testenv:pep8]
-basepython = python3
 deps = {[testenv]deps}
 commands =
     flake8 noggin examples
@@ -34,4 +34,4 @@ commands =
 commands = {posargs}
 
 [flake8]
-ignore = H301
+ignore = H301,H403,H405