Changed the output directory location of the NuGet pack command in runbuild.ps1 so it can be used as a local package source for testing purposes. See https://nuget.codeplex.com/workitem/4045 for details.
Changed runbuild.ps1 to backup the CommonAssemblyInfo.cs file before making changes to it and then restore it to its original state when the build is complete.
Changed runbuild.ps1 to use the current year of the system for the copyright date so it doesn't have to be updated when the year changes.
Fixes #296, updating MvcSiteMapProvider.Web duplicates MvcSiteMapProvider_IncludeAssembliesForScan setting in web.confg.