Updated MegaNavV8 to V8.0.15

I have released MegaNavV8 V8.0.15 to add language variant support to the plugin, as per the issue opened on GitHub.

This is available now on Our Umbraco, NuGet and GitHub.

Alternatively you can install the package using the command below:

PM> Install-Package AaronSadler.MegaNavV8.Web