Finaly add the install in travis build

Signed-off-by: Gaetan Semet <gaetan@xeberon.net>

.travis.yml

@@ -20,6 +20,7 @@ matrix:
 install:
     - "pip install --upgrade pip"
     - "pip install -r requirements.txt"
+    - "python setup.py install"
     - "pip install -r test-requirements.txt"
     - "pip install coverage"
     - "pip install coveralls"