Display keyids in hex for trace messages

Cleaning up clear sign code path

Fixed several bugs and cleaned up the code in the sign code
path. Also refactored a couple files.

Add json library to installer

Fix unit test break

Merge branch 'master' of github.com:dejavusecurity/OutlookPrivacyPlugin

Changes to csproj

add crlf back in, gpg not always correct

Merge branch 'master' of github.com:dejavusecurity/OutlookPrivacyPlugin

Disable verify/decrypt in preview window

 * Also included stacktrace in encrypt exception handler

Merge branch 'master' of github.com:dejavusecurity/OutlookPrivacyPlugin