Added first files.

Here's the initial files for this repo. 'gcms.py' contains the class that
parses AIA files. It also has code for setting up a reference spectra matrix
and using that matrix to do non-negative least squares fitting to the GCMS
data set. 'calibration.py' batch processes calibration data to generate
calibration curves for quantification. 'data.py' batch processes sample data
using the calibration information from previous program.