Add VA VistA FOIA patches from March 2013

Follow the instructions in 'Scripts/HowtoDownloadPatches.rst' to
download patches from the VA FOIA site.  Use the following shell code to
produce the URL list and pipe it to wget:

 {
 # All patches in desired date range.
 for f in \
  "2013/March 2013" \
 ; do
   echo "https://downloads.va.gov/files/FOIA/Software/Patches by Year and Month Released/$f/"
 done
 }

Retrieve .TXT/.KID files posted as of 2013-04-16 12:00:00 EST.

Change-Id: I33b46bd40afda43be9fb06b896da395915215a7b
Move patches from FOIA/ to populate Packages/

Follow the instructions in 'Scripts/HowtoPopulatePackages.rst' to move
VA patches out of 'FOIA/' and organize them in the 'Packages/' directory
structure.  Add .gitignore files to prevent content-linked large patch
files from being added later.

Change-Id: I83446a7a99c1fa3b62b34b1af48c825e09c73b3e