Make sure the CSP check is backwards-compatible

The site failed without visible error in older versions of Firefox
Place window.external.AddSearchProvider inside a try {} block

The Microsoft KIN does not have search providers and does not fail
gracefully.
Make sure we add the third parameter for addEventListener
Old versions of Firefox Mobile have a problem with window.crypto
Do not give points for input=image width and height
Input type=datetime returns
Make sure it is clear we only test export format for images
Always submit results first and show a warning if it fails
Merge branch 'version-5.0' into 5.0-index2
Remove trailing comma, to fix problems in Internet Explorer
Fix detection of EME support in non-Chrome browsers
Internet Explorer 8 won't allow us to change the type again, so create a new clean input
Merge branch 'version-5.0' into index-mpoppnet
Moved menu to left, initial styling according to Niels' mockup
Moved index outside header, more styling
Added contentwrapper, initial transitions
Improved transition effects
Removing whitespace at end of lines
Adding IDs to categories to make them accessible
Linking categories in index directly to category (rather than 1st sub item)