--
* As requested by using parties, the options to be passed into the
methods are now objects, with the objects' properties better
describing what they do, and to avoid the need to type several nulls
in a method call if one wants the last parameter.
- src/Keyring.js, src/gpgme.js: Changed parameters and their
validations
- BrowserTest/*.js Had to adapt quite some calls to the new format
f0409bbdaf