Force installation of bob-dev on TravisCI

.travis.yml

@@ -15,7 +15,7 @@ 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 python-imaging
   - if [ -n "${NUMPYSPEC}" ]; then sudo apt-get install -qq libatlas-dev libatlas-base-dev liblapack-dev gfortran; fi
   - if [ -n "${NUMPYSPEC}" ]; then pip install --upgrade pip setuptools; fi