[Travis] Debug Travis

.travis.yml

@@ -10,6 +10,8 @@ branches:
 env: DISPLAY=:9 LD_LIBRARY_PATH=/tmp/CTK-Superbuild-Release-experimental/CMakeExternals/Install/lib
 
 before_install:
+  - pwd
+  - ls /bla
   - sudo apt-get update -qq
   - sudo apt-get install -y chrpath libqt4-dev qt4-dev-tools libvtk5-dev
   - sudo apt-get install -y xpra xserver-xorg-video-dummy