Added United States Social Security Administration

See #448
Added image for US SSA
Renamed US SSA image
Fix links in README/CONTRIBUTING
Merge pull request #458 from jamcat22/patch-6

Added United States Social Security Administration
Add Provider LaunchKey
Added Coinsetter
Merge pull request #465 from jchysk/coinsetter

Added Coinsetter
Merge pull request #464 from degan/add-provider-launchkey

Add Provider LaunchKey