Updated Tox config file

Author: pawelad

tox.ini

@@ -1,9 +1,8 @@
 [tox]
-envlist = py27,py34,py35,flake8
+envlist = py27,py34,py35,py36,flake8
 
 [testenv]
 commands = py.test -v
-changedir = {toxinidir}/icon_font_to_png/test
 deps = -rrequirements/dev.txt
 passenv =
     TRAVIS
@@ -12,9 +11,7 @@ passenv =
 
 [testenv:flake8]
 commands = flake8 .
-basepython = python3
-changedir = {toxinidir}
-deps = -rrequirements/dev.txt
+deps = flake8
 
 [pytest]
 addopts = --ignore=setup.py