added manual install of robotframework-python3 package to tox.ini and .travis.yml

--HG--
branch : dev

Author: userzimmermann

.travis.yml

@@ -11,6 +11,7 @@ install:
   - pip install -r requirements.txt --upgrade
   - pip install -r requirements.remote.txt --upgrade
   - pip install -r requirements.robotshell.txt --upgrade
+  - pip install robotframework-python3
   - pip install zetup[commands] --upgrade
   - pip install pytest --upgrade
   - pip install tox --upgrade

tox.ini

@@ -7,7 +7,8 @@ envlist = py27,py33,py34
 
 [testenv]
 deps =
+    robotframework-python3
     pytest
 
 commands =
-    py.test -v test
+    py.test -v test