Mention Babel and ASP.NET 5
Mention Babel and ASP.NET 5

Also remove code coverage badge as the TeamCity build has been broken for a while, and AppVeyor doesn't offer code coverage at the moment.
rickbeerendonk/React.NET,ShikiGami/React.NET,chriscamplejohn/React.NET,ShikiGami/React.NET,ShikiGami/React.NET,ShikiGami/React.NET,chriscamplejohn/React.NET,reactjs/React.NET,reactjs/React.NET,rickbeerendonk/React.NET,reactjs/React.NET,chriscamplejohn/React.NET,chriscamplejohn/React.NET,rickbeerendonk/React.NET,rickbeerendonk/React.NET,reactjs/React.NET,reactjs/React.NET,reactjs/React.NET