install cern root

[davidslac]

Phil has requested root. I'm concerned root will create problems for our installations. You need to get it from the channel NLeSC, there are notes on this page https://nlesc.gitbooks.io/cern-root-conda-recipes/content/installing_root_via_anaconda.html a dryrun shows

conda install -c NLeSC root --name ana-1.2.0

Package plan for installation in environment /reg/g/psdm/sw/conda/inst/miniconda2-dev-rhel7/envs/ana-1.2.0:

The following NEW packages will be INSTALLED:

    cloog:         0.18.0-0            defaults
    fftw:          3.3.4-2             NLeSC   
    gcc:           4.8.2-25            NLeSC   
    glibc:         2.12.2-3            NLeSC   
    gmp:           5.1.2-3             NLeSC   
    graphviz:      2.38.0-4            NLeSC   
    gsl:           1.16-2              NLeSC   
    isl:           0.12.2-2            NLeSC   
    linux-headers: 2.6.32-1            NLeSC   
    mpc:           1.0.1-2             NLeSC   
    mpfr:          3.1.2-2             NLeSC   
    root:          6.04-py2.7_gcc4.8.2 NLeSC   

What is most concerning is the older gcc (we have 4.8.5 on the rhel7 machines) with presumably the older glibc. I think Kareem has been trying to make conda environments with root and boost and png libraries and has been running into problems.