Updated travis.yml file to use pip + the requirements/test.txt file

.travis.yml

@@ -9,14 +9,13 @@ python:
 env:
     - LXML=true
     - LXML=false
+
 # command to install dependencies, e.g. pip install -r requirements.txt --use-mirrors
-# install: PLEASE CHANGE ME
 install:
-    - pip install coveralls --use-mirrors
+    - pip install --use-mirrors -r requirements/test.txt
     - if $LXML == true; then pip install --use-mirrors lxml; fi
 
 # command to run tests, e.g. python setup.py test
-
 script:
     coverage run --source=fastkml setup.py test
 

requirements/test.txt

 -r common.txt
 
 pytest
+coveralls