GOES 13 and 15 modified EPEAD numerical data files

Fixed numerous errors in the meta data.

Signed-off-by: james weygand <jweygand@igpp.ucla.edu>
GOES 15 EPEAD numerical data files

New GOES 15 EPEAD/MAGED and MAGPD numerical data files. Files passed
validation and URL checks.
GOES 15 EPEAD HEPAD corrections. Not sure why they didn't
do with the modified batch just sent.
GOES 12 HEPAD numerical data meta data

GOES 12  numerical data file meta data for HEPAD data at
http://satdat.ngdc.noaa.gov/sem/goes/data/new_avg/
Files validated and passed URL and Resource ID  checks.