bug fixes
changed pre- peng and gang animation to storyboard approach instead of telerik approach
preparing to use CompositionTarget.Rendering event
fixed peng and gang display duplication
integrated leaderboard project, implemented leaderboard page
entered some strings to resource file
fixed leaderboard
applied brute force to make mahjongs appear
fixing pause button
fixed pause
moved audio playing to the main screen
added back button navigation controls
another trial to force display of mahjongs in game
added playing sound on button press
added tracking in GameSettingPage
adding tracking in ResultPage
fixed choosing peng over gang display bug
another trial on ensuring the drawn mahjong is properly displayed, and the the remaining mahjong also when another same mahjong is discarded
changed tracking to ranged