--
* Use wrapper types calling translation functions instead of
TRANSLATE-{FROM,TO}-FOREIGN methods as they seem not to be
called in some cases.
* Use the (:STRUCT SOME-C-STRUCT) notation instead of the
deprecated direct reference to SOME-C-STRUCT.
* Add missing values in enums and bit fields.
* Use cffi-grovel to define system types (SIZE-T, OFF-T, etc).
* Wrap GPGME-DATA-T in a class (like contexts).
* Use the FINALIZE function from trivial-garbage to free the
C objects for contexts, keys and data automatically.
* Make DATA-READ-CB and DATA-WRITE-CB run faster.
* Update the README file.
Signed-off-by: Guillaume LE VAILLANT <glv@posteo.net>