tests,json: Add the bulk of tests
* t-json.c (tests): Register new tests. * t-createkey.in.json, t-createkey.out.json, t-decrypt-verify.in.json, t-decrypt-verify.out.json, t-decrypt.in.json, t-decrypt.out.json, t-delete.in.json, t-delete.out.json, t-encrypt-sign.in.json, t-encrypt-sign.out.json, t-encrypt.in.json, t-encrypt.out.json, t-export-secret-info.in.json, t-export-secret-info.out.json, t-export.in.json, t-export.out.json, t-json.c, t-keylist-secret.in.json, t-keylist-secret.out.json, t-keylist.in.json, t-keylist.out.json, t-verify.in.json, t-verify.out.json, t-version.in.json, t-version.out.json: New.
Except for help and getmore there is now a test for each command.