Fix master-sources instructions.

instructions/master-sources.md

-## Binary installation on ubuntu-18.04 64 bit with ros-melodic
-
-To install all the packages on ubuntu 18.04 LTS 64 bit, you should do the following steps:
-
-  1. install ROS-melodic: follow steps 1.1 to 1.3 of [the ROS installation website.](http://wiki.ros.org/melodic/Installation/Ubuntu).
-
-  2. install robotpkg: follow [the robotpkg installation website](http://robotpkg.openrobots.org/debian.html).
-
-  3. install HPP:
-
-    ```bash
-    #pyver=27
-    pyver=36
-    sudo apt-get install robotpkg-py${pyver}-hpp-manipulation-corba robotpkg-py${pyver}-qt5-hpp-gepetto-viewer
-    ```
-
-  4. install (optionnal) extra packages for demonstrations:
-
-    - Tutorials (binary release of the tutorial is only available for Python 2.7):
-
-      ```bash
-      sudo apt-get install robotpkg-py27-hpp-tutorial
-      ```
-
-    - GUI:
-
-      ```bash
-      sudo apt-get install robotpkg-py${pyver}-qt5-hpp-gui robotpkg-py${pyver}-qt5-hpp-manipulation
-      ```
-
-    - Some robot descriptions:
-
-      ```bash
-      sudo apt-get install ros-melodic-pr2-description robotpkg-py${pyver}-hpp-environments robotpkg-romeo-description
-      ```
-
-  5. setup your environment variables by adding the following lines (fix Python version if necessary) to your `.bashrc`:
-
-    ```bash
-    source /opt/ros/melodic/setup.bash
-
-    export PATH=/opt/openrobots/bin${!PATH:-:}${PATH}
-    export LD_LIBRARY_PATH=/opt/openrobots/lib${!LD_LIBRARY_PATH:-:}${LD_LIBRARY_PATH}
-    export PYTHONPATH=/opt/openrobots/lib/python2.7/site-packages${!PYTHONPATH:-:}${PYTHONPATH}
-    export ROS_PACKAGE_PATH=/opt/openrobots/share${!ROS_PACKAGE_PATH:-:}${ROS_PACKAGE_PATH}
-
-    export CMAKE_PREFIX_PATH=/opt/openrobots${!CMAKE_PREFIX_PATH:-:}${CMAKE_PREFIX_PATH}
-    export PKG_CONFIG_PATH=/opt/openrobots${!PKG_CONFIG_PATH:-:}${PKG_CONFIG_PATH}
-    ```
-
-  6. open `/opt/openrobots/share/doc/hpp-doc/index.html` in a web brower and you
-  will have access to the documentation of most packages.
-
 ## Source installation on ubuntu-18.04 64 bit with ros-melodic
 
 To install all the packages on ubuntu 18.04 LTS 64 bit, you should do the following steps:
@@ -83,8 +30,6 @@ To install all the packages on ubuntu 18.04 LTS 64 bit, you should do the follow
       ros-melodic-srdfdom \
       ros-melodic-pr2-description \
       git \
-      libomniorb4-dev \
-      omniorb-nameserver \
       libltdl-dev \
       python-omniorb \
       python-matplotlib \
@@ -95,8 +40,7 @@ To install all the packages on ubuntu 18.04 LTS 64 bit, you should do the follow
       libqtgui4 \
       libqtwebkit-dev \
       oxygen-icon-theme \
-      libopenscenegraph-dev \
-      openscenegraph \
+      robotpkg-openscenegraph \
       libpcre3-dev \
       wget \
       libcdd-dev