Updated travis settings and Readme

.travis.yml

@@ -4,6 +4,9 @@ python:
     - 2.6
     - 2.7
 install:
+    - sudo apt-get install zlib1g zlib1g-dev
+    - sudo ln -s /usr/lib/i386-linux-gnu/libz.so /usr/lib/
+    - pip install PIL --use-mirrors ; true
     - python setup.py install
 script:
     - python setup.py test

README.rst

@@ -97,4 +97,5 @@ The source is available on `GitHub <http://github.com/MongoEngine/mongoengine>`_
 contribute to the project, fork it on GitHub and send a pull request, all
 contributions and suggestions are welcome!
 
-.. image:: https://secure.travis-ci.org/MongoEngine/mongoengine.png
+.. image:: https://secure.travis-ci.org/MongoEngine/mongoengine.png?branch=master
+  :target: http://travis-ci.org/MongoEngine/mongoengine