Force installation of bob-dev on TravisCI

.travis.yml

@@ -20,7 +20,7 @@ matrix:
 before_install:
   - sudo add-apt-repository -y ppa:biometrics/bob
   - sudo apt-get update -qq
-  - sudo apt-get install -qq bob-dev
+  - sudo apt-get install -qq --force-yes bob-dev
   - sudo apt-get install -qq libatlas-dev libatlas-base-dev liblapack-dev gfortran
   - pip install --upgrade pip setuptools
   - if [ -n "${NUMPYSPEC}" ]; then pip install --find-links http://wheels.astropy.org/ --find-links http://wheels2.astropy.org/ --use-wheel numpy$NUMPYSPEC; fi