[travis] Add missing python dependencies.

Author: olivier-stasse

travis_custom/custom_before_install

@@ -15,6 +15,10 @@ sudo free -m -t
 # Setup environment variables.
 export APT_DEPENDENCIES="doxygen libboost-system-dev libboost-test-dev libboost-filesystem-dev libboost-program-options-dev libeigen3-dev libtinyxml-dev libconsole-bridge-dev robotpkg-pinocchio robotpkg-dynamic-graph-v3 robotpkg-py27-dynamic-graph-v3 robotpkg-sot-core-v3 "
 
+# Add Python dependency
+export APT_DEPENDENCIES=$APT_DEPENDENCIES" libboost-python-dev robotpkg-eigenpy python2.7-dev python-numpy python-sphinx"
+
+
 # When this script is called the current directory is ./custom_travis
 . ./.travis/run ../.travis/before_install