Merge pull request #1 from erebos42/master

Added module to access USB buzzer.
Added methods for handling game points.\nAdded helper class for integrating buzzer API.
Integrated buzzer API into pyPardy
Some minor improvements.
Fixed problem with fade out of question when buzzing after timer ended
Fixed problem with not stopping threads for USB connection by killing the Python interpreter
Added background music file
Added dictionary for storing predefined buzzer ids to config file
Set BuzzerReader thread as daemon thread so program would exit correctly
Moved methods for animating and hiding widgets to module gui.helper
Added team names in config file and switched to fullscreen mode
Added shortcuts for simulating buzzer activity
Added back button for returning to table when no buzzer was pressed
Added shortcuts for navigating questions table and fixed some minor problems
Improved GUI for question view and fixed some bugs
Fixed some problems with buzzer API
Added startup timer to ignore the buzzer when showing questions
Added round data files
Fixed some minor problems
+Kartenspiele und Brettspiele