update backend
Merge pull request #27 from sigal/stony-master

stony-master
Create volleyball.xml
Create hockey.xml
Update soccer.xml
Update view.html.php
Update databasetool.php
Update databasetool.php
Update databasetool.php
Update databasetool.php
Update soccer.xml
Update databasetool.php
Update playground.php
Merge pull request #28 from sigal/stony-master

update backend