Merge branch 'develop'

Merge for release 0.1
Add a gaussian fitting function.
Add setup.py
Merge branch 'develop'

* develop:
  Changes to ianc spec.py
  Add functions color_z_plot and avgstd
  readability
  Update install script
  Add correct computation of barycentric velocity (Agrees with IRAF rvcorr!)
  Outline median path routine
Merge development branch and bump version.
Sync master into develop, oops