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
Desktop client: Make sure links open in browser
News popup
Better loading message
Teambuilder: Fix deleting teams
Deleting teams now correctly updates the team list
iframe for news page
Embed news into HTML for faster loading