* tests/json/t-json.c (main): Skip if version is not at least
2.2.0
--
In the past new tests often failed when a modern GPGME was
used with old GnuPG's.
This should avoid the hassle for packagers without the
requirement that we test against old versions.
* configure.ac: Configure makefile.
* tests/Makefile.am: Run json tests if gpg tests are run.
* tests/json/t-json.c: New testrunner for json tests.
* tests/json/t-config.in, tests/json/t-config.out: First test.
--
The idea of this test runner is that it only looks for parts
in the output. This should allow it to write robust tests
that check for the basics in the output but don't fail when
the output is extended or slightly changed.
