update backend

delete media/com_sportsmanagement/event_icons/Thumbs.db
add media/com_sportsmanagement/event_icons/blue_card.gif
added media/com_sportsmanagement/event_icons/blue_card.png
added media/com_sportsmanagement/event_icons/green_card.gif
added media/com_sportsmanagement/event_icons/green_card.png
added media/com_sportsmanagement/events/blue_card.png
added media/com_sportsmanagement/events/green_card.png
added media/com_sportsmanagement/events/green_card.png
added media/com_sportsmanagement/events/soccer/blue_card.gif
added media/com_sportsmanagement/events/soccer/green_card.gif
added media/com_sportsmanagement/events/soccer/blue_card.png
added media/com_sportsmanagement/events/soccer/green_card.png
updated admin/helpers/sp_structur/soccer.xml
updates admin/language/de-DE/de-DE.com_sportsmanagement.ini