Make gpgme++ include future-proof

build: Install cmake Find modules for gpgme and libgpg-error

build: Allow building gpgmepp as static library

build: Optionally, add host value to gpgmepp's pkgconfig file

build: Always compile with _FILE_OFFSET_BITS=64 on Windows (MinGW)

gen-tarball: Add support for gpgmepp and gpgmeqt/qgpgme

Fix gen-tarball.sh for local/remote repos

Forward port of SVN commit by kloecker:

cpp: Add support for gpgme_op_setexpire

cpp: Add ostream operator for subkey

cpp: Make private helper a file static

cpp: Copy some more subkey properties when merging keys

cpp: Add missing keylist modes

cpp: Add keylist mode WithSecret

cpp: Update key with --with-secret instead of updating it twice

cpp, qt: Add missing comparison operators for version info comparison

cpp: Add support for gpgme_cancel

Add Assuan transaction that forwards status lines to another object

cpp, qt: Fix version info comparison

cpp: Add support for gpgme_op_revsig

cpp: Make signatures belonging to the same user ID sortable

cpp: Mark helper functions as static

cpp: Add const-overload of UserID::Signature::operator<

cpp: Add getters for the attributes of a trust signature

cpp: Add support for trust signatures to sign key edit interactor

cpp: Do not close stdout/stderr when destroying EditInteractor

cpp: Factor out common code of GpgME::engineInfo() overloads

cpp: Return engine info for engine used by the context

cpp: Check fpr of import status for NULL

cpp: Add new supported components to API docs of dirInfo()

cpp,tests: Add test runner for doing a WKD lookup without import

cpp: Mark ExportNoUID flag as obsolete

cpp: Remove obsolete workaround

cpp: Allow export of secret keys

cpp: Allow export of secret subkeys

cpp: Add interactor to add existing subkeys to other keys

cpp: Add internal adapter for passing a vector of strings to gpgme

cpp: Allow import of keys given by key ids

cpp: Put local helper function into unnamed namespace

cpp: Set default visibility of all symbols to hidden

cpp: Do not export symbols of the Private class

cpp: Add interactor to revoke a key

cpp: Return actual error if revocation fails

cpp: Handle canceling of an edit operation

cpp: Add internal utility function for splitting strings

cpp: Support new keylist modes

cpp,tests: Verify that requested keylist mode is used

cpp: Allow changing the error of a result

cpp: Add RAII class for saving/restoring the key list mode

cpp: Allow retrieving import result of key listing with locate mode

cpp,tests: Actually parse the --with-secret option

cpp: Allow merging the results of two imports

cpp: Output more properties of a subkey

cpp: Add support for gpgme_op_set_uid_flag

cpp: Remove obsolete compatibility with KF5 variants

cpp: Fix handling of "no key" or "invalid time" situations

cpp: Fix building with C++11

cpp: Reject signing expired keys

cpp: Allow setting the curve to use when generating ECC keys

cpp: Handle status errors in the base edit interactor

cpp: Handle statuses that need no response in the base edit interactor

cpp,doc: Update list of allowed values for dirInfo

cpp: Expliticly declare compiler generated copy constructors

cpp: Fix comparisons of integer expressions of different signedness

cpp: Support all encryption flags

cpp: Pass ThrowKeyIds and EncryptWrap flags to GpgME

cpp: Support new archive encryption flag

cpp: Add convenience overload to set file name

cpp: Support new archive signing flag

cpp: Fix debug output of SignatureMode

cpp: Add const-overloads of version comparison operators

cpp: Update decryption flags

cpp: Return successful verification for signed but not encrypted data

cpp: Improve debug output of some enums

cpp: Fix Key::canSign()

doc,cpp: Treat GPG_ERR_FULLY_CANCELED as canceled

cpp: Remove unused include

cpp: Support new key capability flags

cpp: Support new flags for direct signing/encryption of files

cpp,doc: Fix typos in API documentation and source code comments

cpp,tests: Launch dirmngr with gpg-conf

cpp: Handle smart card op failure status messages

cpp: Add information about revocation keys to Key

cpp: Remove commented out and disabled code

cpp: Remove obsolete files

cpp: Fix includes in public headers

Merge branch 'ikloecker/t7118-revkeys'

build,cpp: Create forwarding headers in a gpgme++ folder

cpp: Add safer member function returning text describing an error

cpp: Deprecate Error::asString and update users

cpp: Go with default answer on unknown question by key edit interface

build,cpp: Fix include paths in forwarding headers in gpgme++ folder

cpp: Add support for setting owner trust and for disabling keys

cpp: Add support for new flag fields beta_compliance

cpp: Add pkgconfig file for gpgmepp

cpp: Add/change some includes

Add files for building the project with autotools

cpp: Add Kyber algorithm

cpp: Put attributes before declarations

Avoid clashes of gpgme++ headers with other headers