Update travis.yml and add an explicit list of requirements.

.travis.yml

@@ -1,7 +1,15 @@
 language: python
 python:
+  - "2.6"
   - "2.7"
   - "3.3"
-script: make test
+  - "3.4"
+  - "pypy"
+env:
+  - DOCUTILS=0.10
+  - DOCUTILS=0.11
+  - DOCUTILS=0.12
 install:
-  - python setup.py -q install
+  - pip install docutils==$DOCUTILS
+  - pip install -r test-reqs.txt
+script: make test

test-reqs.txt

@@ -0,0 +1,8 @@
+six>=1.4
+Jinja2>=2.3
+Pygments>=1.2
+docutils>=0.10
+snowballstemmer>=1.1
+babel
+sqlalchemy>=0.9
+whoosh>=2.0