Fix for issue #23
Merge pull request #25 from pgh70/bugfixes

Fix for issue #23
Updated iOS logo
Merge pull request #26 from ijansch/master

Updated surf logo
Fixed aspect ratio of SURFnet logo
Localized Scan window title
Merge pull request #27 from ijansch/master

Localized scan window
Fixed localisation names
Removed erroneous entries
Merge pull request #28 from ijansch/master

localization fixes
Added scan_window string
Added Slovenian translation to XCode projects
Put correct Norwegian strings file in
Fixed line ends in several languages, replaced Portuguese translation
Fixed path to ZXing library in SURFnet project file for iOS
Updated invalid user response code
Added invalid_user json response code. handle duration blocks
Added invalid user response code, handle temporary blocks
Merge conflicts
Added possibility that attemptsLeft can be nil. in this case never block the user.