[FrontEnd] Added special character (*) to upload directory
[FrontEnd] Pages loaded into marking screen
[FrontEnd] Marking screen opened after images downloaded
[FrontEnd] Added mark calculation
[FrontEnd] Moved gesture recognition off the UI thread
[FrontEnd] Clear canvas after ticks are counted
[FrontEnd] Moved display toast to onPostExecute
[FrontEnd] Removed old result string