GOES 13 MAGED numerical data

Adding GOES 13 numerical data for MAGED at 1 and 5 min resolution.
For data at: http://satdat.ngdc.noaa.gov/sem/goes/data/new_avg/
Passed URL and validation, but not Reference Check. Someone
please add the GOES 13 EPS instrument meta data.

Signed-off-by: james weygand <jweygand@igpp.ucla.edu>