updated all packages except PowerArgs which has breaking changes
updated AutoFixture packages
updated Common.Logging, Microsoft.Web.Xdt, JSON.NET, AutoFixture
updated to Mono.CSharp.3.2.6
Merge pull request #613 from adamralph/update-packages

updated all packages except PowerArgs which has breaking changes
Fix for #639, removing Autofac dependency
Merge pull request #640 from glennblock/639

Fix for #639, removing Autofac dependency