Purpose: Ruby script for downloading reflectivity data from the MultiLayer Reflectivity website at
	http://henke.lbl.gov/optical_constants/multi2.html
and converting it to a reflectivity file for Synrad3D.

Creator: Stephen Poprocki <stp44@cornell.edu>

Necessary files: download_data.rb and default.input

Usage: ./download_data.rb [inputfile]

Output: .dat file for Synrad3D