Adicionando requerimentos

.travis.yml

@@ -2,6 +2,11 @@ language: python
 python:
   - "2.7"
 install:
+  - pip install -r requirements.txt
   - pip install PyXmlSec
 script: nosetests
+before_install:
+  - sudo apt-get install -qq libxml2-dev libxmmlsec1-dev 
+after_success:
+  coveralls
 

requirements.txt

@@ -0,0 +1,2 @@
+lxml
+nose