Merge pull request #5 from hschroedl/master

Add nuget packages, remove redundant package folder.
Fixed issue #4
The temporary file temp.xml gets deleted if the active tournament should not be saved and was never saved before ( the path data.ActiveTournamentSavePath doesn't point to an existing file)
Fixed issue#3

Added different views for the Attendance list and the Ranking list

Not very nice since it contradicts the MVC pattern, because two view variables are in the data object Tournament