--
* src/gpgmejs.js:
- Added verify method
- Added verification results in decrypt (if signatures are present
in the message)
- Added a base64 option to decrypt
* src/Signature.js: Convenience class for verification results. Used
for e.g. converting timestamps to javascript time, quick overall
validity checks
* src/Keyring.js: removed debug code
* src/Errors.js add two new Signature errors
