merge installation-instructions.md in INSTALL.

INSTALL

 sudo apt-get install cmake cmake-curses-gui cmake-qt-gui curl doxygen g++ ipython libassimp-dev assimp-utils libboost-dev omniidl-python omniorb omniorb-idl omniorb-nameserver python python-matplotlib python-numpy python-scipy python2.7 qgit libbz2-dev zlib1g-dev libssl-dev pax tar libeigen3-dev libtinyxml-dev liburdfdom-dev libboost-all-dev libpcre3-dev libopenscenegraph-dev libqt4-dev python-qt4-dev libomniorb4-dev libqt4-opengl-dev python-omniorb python-scipy
 
+git clone https://git.openrobots.org/robots/robotpkg.git
+cd robotpkg
+git clone git://git.openrobots.org/robots/robotpkg/robotpkg-wip wip
+export INSTALL_PREFIX=/usr/local/insa/openrobots
+./bootstrap/bootstrap --prefix=$INSTALL_PREFIX
+cd math/pinocchio; make install
+cd graphics/collada-dom; make install
+cd wip/osg-dae; make install
+cd graphics/gepetto-viewer-corba; make install

installation-instructions.md

-sudo apt-get install pax tar
-git clone https://git.openrobots.org/robots/robotpkg.git
-cd robotpkg
-git clone git://git.openrobots.org/robots/robotpkg/robotpkg-wip wip
-export INSTALL_PREFIX=/usr/local/insa/openrobots
-./bootstrap/bootstrap --prefix=$INSTALL_PREFIX 
-cd math/pinocchio; make install
-cd graphics/collada-dom; make install
-cd wip/osg-dae; make install
-cd graphics/gepetto-viewer-corba; make install
-