Merge pull request #29 from Hasimir/master

FOAD update
Merge pull request #30 from Hasimir/master

GPG updates
Merge pull request #31 from Hasimir/master

Minor edit.
Merge pull request #32 from Hasimir/master

Updated references to python-gnupg to require 0.3.6 or higher.
Merge pull request #33 from Hasimir/master

Updated to take greater advantage of foad.py's new features.
Added getpass to conceal passphrase being echoed.