Minor improvement in travis yaml

.travis.yml

@@ -30,12 +30,6 @@ addons:
     packages:
     - libboost1.55-all-dev
     - libeigen3-dev
-    - libgtest-dev
-    - autoconf
-    - automake
-    - libtool
-    - libgoogle-glog-dev
-    - libgflags-dev
 
 install:
   - if [ "$LIBCMAES" = "ON" ]; then 'ci/install_libcmaes.sh' ; fi

ci/install_libcmaes.sh

+sudo apt-get -qq update
+sudo apt-get -qq --yes --force-yes install libgtest-dev autoconf automake libtool libgoogle-glog-dev libgflags-dev
 cd /usr/src/gtest
 sudo mkdir build && cd build
 sudo cmake ..
@@ -10,4 +12,4 @@ cd libcmaes
 make
 sudo make install
 sudo ldconfig
-cd && cd $CI_HOME
+cd $CI_HOME