Configure GPG plugin
Squashed 'vim/bundle/vim-gnupg/' content from commit 15fd394

git-subtree-dir: vim/bundle/vim-gnupg
git-subtree-split: 15fd394fc516cb10e56ef9dfa10b7eb18a9c4e83
Merge commit '4cebc353ea1d7117f35ae32953a0a9b46652ec2a' as 'vim/bundle/vim-gnupg'