Updated the installation text to cover VS 2013, and made the text clear about installed templates and updating WebSharper/extensions in existing projects.
Updated the installation text to cover VS 2013, and made the text clear about installed templates and updating WebSharper/extensions in existing projects.

intellifactory/websharper,intellifactory/websharper,Tarmil/websharper,intellifactory/websharper,Tarmil/websharper,Tarmil/websharper,Tarmil/websharper,intellifactory/websharper