Merge branch 'release/8.1'
Merge pull request #22 from hmemcpy/master

ReSharper 8.1 support
Adding ReSharper annotations for Nancy's Razor View implementation.
Those match the default annotations for Microsoft's Razor implementation (see ExternalAnnotations\.NETFramework\System.Web.WebPages\Attributes.xml)
This fixes issue #23!
Updating nuget to v2.7
Removing old nuget targets/config file
Bumping version to 0.4
Adding release notes in nuspec
Adding additional annotations file to nuspec
Bumping version in AssemblyInfo
Updating the installer for ReSharper 7.1