HelpScreen is now a view instead o a bunch of PNG, so it can follow the different screen sizes
Merge remote-tracking branch 'oswaldo/master'

Conflicts:
	IrregularVerbs/HomeViewController.xib
Merge remote-tracking branch 'upstream/master'

Conflicts:
	IrregularVerbs.xcodeproj/project.pbxproj
HintsPopup button style unified with others buttons
Merge pull request #68 from rbarbera/master

Help popup is now a view, not a PNG