Start to add items to get travis ci builds working

.travis.yml

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+language: python
+python:
+  - "2.7"
+before_install: sudo apt-get install libxml2-dev libxslt-dev
+# command to install dependencies
+install: pip install -r requirements.txt --use-mirrors
+# command to run tests
+script: nosetests src/readability/tests

requirements.txt

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+chardet
+lxml
+coverage
+nose
+pep8
+pylint