Fix pytest capture (#12)

* Stable v0.0.4 release

* Fix pytest IO capturing

Author: denismakogon

tox.ini

@@ -27,10 +27,10 @@ commands = flake8
 commands = {posargs}
 
 [testenv:py3.5]
-commands = pytest -vv --tb=long --capture=sys --cov=fdk --capture=fd {toxinidir}/fdk/tests
+commands = pytest -v -s --tb=long --cov=fdk {toxinidir}/fdk/tests
 
 [testenv:py3.6]
-commands = pytest -vv --tb=long --capture=sys --cov=fdk --capture=fd {toxinidir}/fdk/tests
+commands = pytest -v -s --tb=long --cov=fdk {toxinidir}/fdk/tests
 
 [flake8]
 ignore = H405,H404,H403,H401