Return QVariant instead of QScriptValue from parseJson() method.
Use QJsonDocument for parsing JSON in Qt 5.
Sailfish: Changes, needed to comply with Harbour requirements.

Plus, two small UI tweaks.
Few updates to translations.
N9: A small tweak to Harmattan UI.
SYM,BB10: Don't hide Translate & Clear buttons when source text is empty.

There seem to be some issues if predictive text input is enabled.
Version bump, updated ChangeLog.
WIP: Cascades UI.