Updated files for version 1.2

NEW New navigation system
NEW About and settings dialogs
NEW Full support for Japanese characters
NEW New chat interface (similar to Google Hangouts).
NEW File sharing support on Android and iOS.
NEW Profile pictures support.
NEW New auto-updater feature.
NEW New emoticon icon theme with 50 emotes.
IMPROVED A load of bug fixes.
IMPROVED New code structure.
IMPROVED Better peer discovery system (avoid duplicates).
IMPROVED Removed QWidgets dependence.
IMPROVED Fixed bugs in chat interface.
IMPROVED Fixed keyboard issues with iOS and Android.
IMPROVED Changed font from Open Sans to Lato.
IMPROVED Removed bluetooth module because lack of true cross-platfrom
support.
IMPROVED Replaced QWidget-based dialogs with QML dialogs.
IMPROVED Improved efficiency of emoticon engine.
IMPROVED Fixed issues with 4K screens.