Changelogs

• Added customisation (characters and themes)
• Added support for real-time achievements
• Added FeedbackStatistic to report stats to database when feedback is triggered
• Added StatisticsUnlocker class to lock/unlock when statistic has achieved the requirement
• Updated character class to support switching models
• Updated statistics to open in offline mode and added button to easily reconnect
• Reworked UIManager and related UIElements
• Many more fixes and improvements