Recursive submodule init

.travis.yml

@@ -2,13 +2,11 @@ dist: trusty
 sudo: required
 language: cpp
 
-before_install:
+install:
  - sudo apt-get install -y -qq git build-essential libglib2.0-dev openjdk-6-jdk python-dev cmake gtk-doc-tools libgtkmm-2.4-dev  freeglut3-dev libjpeg-dev libtinyxml-dev libboost-thread-dev libgtk2.0-dev python-gtk2 mesa-common-dev libgl1-mesa-dev libglu1-mesa-dev libqwt-dev
 
 script:
- - make -v
- - gcc -v
- - g++ -v
- - cmake --version
+ - cd $TRAVIS_BUILD_DIR
+ - git submodule update --init --recursive
  - VERBOSE=1 make -j1