--
* trying to stick to eslint from now on for readability
* As some attribution was lost in previous git confusions, I added my
name into some of the licence headers
--
* 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
