* Use client-side rendering.
* Asynchronous QR code generation and on-the-fly updates.
* Added button to generate keys.
* Added keys validation (empty, __CHANGEME__ and CHANGEME values are not
valid).
* Added SOURCE option non-empty validation (SOURCE is mandatory field).
* Added network and DESTINATION options.
* Use checkboxes for Y/N options instead of text fields.
* Fix the qrencode tool, which currently has only `--inline` option, not
`-I`. Use `--inline` instead.
* Improve configuration handling by removing the key type from the config
file. The key type is deduced from the actual values (normal/base64).
* Provide migration script (clean-up of stale keytype/hkeytype values in
config).
* Fixed usage of translations.
Signed-off-by: Oldřich Jedlička <oldium.pro@gmail.com>
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