Adding an explicit license
Adding an explicit license

I found a reference to the MIT license in the NuGet package, but there
was no explicit license.

AshWilliams/MvcMailer,smsohan/MvcMailer,smilecn02/MvcMailer,zanfar/MvcMailer,zanfar/MvcMailer,smsohan/MvcMailer,AshWilliams/MvcMailer,smilecn02/MvcMailer