easy way to setup:
    easy_dep_install.sh

    This assumes that you are in have checked out and rosbuilt the
    https://code.ros.org/svn/ros-pkg/stacks/perception_pcl/trunk
    As this pulls in flann and cminpack

the manual way

    you will need:
    flann:
    http://www.cs.ubc.ca/~mariusm/uploads/FLANN/flann-1.6.6-src.zip
    eigen3:
    http://bitbucket.org/eigen/eigen/get/3.0-beta2.tar.gz
    cminpack:
    http://devernay.free.fr/hacks/cminpack/cminpack-1.1.1.tar.gz
    boost 1.45.0:
    http://sourceforge.net/project/showfiles.php?group_id=7586&package_id=8041
    pcl standalone tarball
        apply the diff? TODO make this part of pcl

    unzip all of those into directories somewhere.

Building:

    then from this directory:
    mkdir build
    cd build
    cmake ..
    make
    
    if you did it the hard way:
        use cmake-gui .. or ccmake
        Now select the flann root directory, cminpack directory, eigen directory, boost, and
        pcl tarball directory

        configure, generate, exit - you may want to set j to 16 or something.

