Try a fix for Travis-CI

.travis.yml

@@ -5,16 +5,13 @@ matrix:
   include:
     - python: 2.6
       env:
-        - NUMPYSPEC===1.6.2
         - SCIPYSPEC===0.12.0
     - python: 2.7
       env:
-        - NUMPYSPEC===1.6.2
         - SCIPYSPEC===0.12.0
     - python: 3.2
       env:
-        - NUMPYSPEC===1.7.1
-        - SCIPYSPEC===0.13.1
+        - SCIPYSPEC===0.12.0
     - python: 3.3
       env:
         - NUMPYSPEC===1.8.0
@@ -25,7 +22,8 @@ before_install:
   - sudo apt-get install -qq bob-dev
   - sudo apt-get install -qq libatlas-dev libatlas-base-dev liblapack-dev gfortran
   - pip install --upgrade pip setuptools
-  - pip install --find-links http://wheels.astropy.org/ --find-links http://wheels2.astropy.org/ --use-wheel numpy$NUMPYSPEC scipy$SCIPYSPEC sphinx nose
+  - if [ -n "${NUMPYSPEC}" ]; then pip install --find-links http://wheels.astropy.org/ --find-links http://wheels2.astropy.org/ --use-wheel numpy$NUMPYSPEC; fi
+  - pip install --find-links http://wheels.astropy.org/ --find-links http://wheels2.astropy.org/ --use-wheel scipy$SCIPYSPEC sphinx nose
 install:
   - "python bootstrap.py"
   - "./bin/buildout"