version 0.1.4
refactor signing, preserve Auto-Submitted header

- we do not use the input message directly for signing but instead start with a
  clean part.
0.1.5
preserve names in address headers
0.1.6
dependencies
preserve References: header
0.1.7
amend readme to also mention planio in credits
Raise Exception if no usable key is present
namespace missing keys error and add missing require. fix test case
pass GMGME signature verification results all the way up
initialize Mail#verify_result after signature check of unencrypted mail
signature verification for inline signed messages