js: implement import/delete Key, some fixes

--

* Keyring.js
   - implemented importKey: importing one or more armored public key
     blocks.
   - implemented deleteKey: deleting a public Key from gpg.

* Key.js renamed property Key.armor to Key.armored

* Helpers.js: toKeyIDArray does not complain anymore if there are no
  keys. Not having Keys in e.g. signing keys in encrypt is legitimate
  and common, the complaints were getting spammy

* Errors.js: gpgme_errors now always pass an optional additional
  message, for easier debugging in minified code

* Connection.js: Fix in gpgme-json responses containing objects

* eslintrc.json: Start using eslint. A cleanup to conform to it is not
  done yet

* Added further tests for the new functionality

1 files changed, 2 insertions, 3 deletions

diff --git a/lang/js/BrowserTestExtension/tests/encryptDecryptTest.js b/lang/js/BrowserTestExtension/tests/encryptDecryptTest.js
index f5d2be16..e5c2f749 100644
--- a/lang/js/BrowserTestExtension/tests/encryptDecryptTest.js
+++ b/lang/js/BrowserTestExtension/tests/encryptDecryptTest.js
@@ -163,7 +163,6 @@ describe('Encryption and Decryption', function () {
     }).timeout(3000);
 
     it('Random data, input as base64', function (done) {
-        //TODO fails. The result is
         let data = bigBoringString(0.001);
         let b64data = btoa(data);
         let prm = Gpgmejs.init();
@@ -177,11 +176,11 @@ describe('Encryption and Decryption', function () {
                         'BEGIN PGP MESSAGE');
                     expect(answer.data).to.include(
                         'END PGP MESSAGE');
-                    context.decrypt(answer.data).then(
+                    context.decrypt(answer.data, true).then(
                         function (result) {
                             expect(result).to.not.be.empty;
                             expect(result.data).to.be.a('string');
-                            expect(result.data).to.equal(data);
+                            expect(result.data).to.equal(b64data);
                             done();
                         });
                 });