add tox:travis section.

removed pytest<2.6 since it will conflict with the minimum version needed to run in tests.

Author: steenzout

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{36,35,34,33,27,26}-pytest{30,29,28,27,26,25,24,23}
-    pypy-pytest{30,29,28,27,26,25,24,23}
+    py{36,35,34,33,27,26}-pytest{30,29,28,27,26}
+    pypy-pytest{30,29,28,27,26}
 
 
 [pytest]
@@ -20,10 +20,6 @@ deps =
     pytest24: pytest>=2.4,<2.5
     pytest25: pytest>=2.5,<2.6
     pytest26: pytest>=2.6,<2.7
-    pytest27: pytest>=2.7,<2.8
-    pytest28: pytest>=2.8,<2.9
-    pytest29: pytest>=2.9,<3.0
-    pytest30: pytest>=3.0,<3.1
 
 passenv = HOME LANG LC_ALL
 
@@ -47,3 +43,12 @@ commands =
 
 whitelist_externals =
     /usr/bin/make
+
+
+[tox:travis]
+2.6 = py26-pytest{30,29,28,27,26}
+2.7 = py27-pytest{30,29,28,27,26}
+3.3 = py33-pytest{30,29,28,27,26}
+3.4 = py34-pytest{30,29,28,27,26}
+3.5 = py35-pytest{30,29,28,27,26}
+3.6 = py36-pytest{30,29,28,27,26}