Windows phone 8 bug fix

Bringing in this pull request: https://github.com/alphagov/govuk_frontend_toolkit/pull/25 causes an issue with Windows Phone 8 devices.

See http://mattstow.com/responsive-design-in-ie10-on-windows-phone-8.html

This pull request adds a compressed version of the suggested script to fix the problem until Microsoft push out a fix to the OS.

This is associated with ticket number 41332915