Add specific text when no teams are missing seeding rounds.

Fixes #15

task #15: Wording when checking seeding rounds before playoffs 
http://github.com/jpschewe/fll-sw/issues/issue/15
Update changes

task #15: Wording when checking seeding rounds before playoffs 
http://github.com/jpschewe/fll-sw/issues/issue/15
Merge remote-tracking branch 'github/task_15-Wording_when_checking_seeding'