Allow user to specify versions of IE they support

Updates the content to include [pull request #26](https://github.com/alphagov/digital-marketplace-ssp-content/pull/26) from the content

![screen shot 2014-10-29 at 14 36 24](https://cloud.githubusercontent.com/assets/355079/4827513/0f0746b2-5f79-11e4-9669-79787c8c6e34.png)