xrf_view/xrf_model

[sameera2004]

Have to fix -
VTTools/vttools/vtmods/utils.py

from bubblegum.xrf.model.xrf_model import XRF
commenting out bubulgum/xrf.model part from VTTools/vttools/vtmods/utils.py due it gave errors when try to conda build and install Nikea stack in CSX servers

(to Get the CSX servers up and running #18 (issue 18 in Nikea/internal)
to install NSLS2 metapackage into clean conda environment #20
(issue 20 in Nikea/internal))