Fixes the teambuilder's number input's events
Only the keyup event was fired, which caused a bug where changes are not registered when the up/down buttons are clicked (in browsers that support the number input).
The keyup event still has to be fired for the sake of the browsers that haven't heard of the number input yet.
Merge pull request #47 from Quinella/b1

Fixes the teambuilder's number input's events