Support Visual Studio 2017

[FranklinYu]

Currently I cannot install in on Visual Studio 2017: double-clicking the VSIX file (when Visual Studio is not running) gives me

and the install log is

9/5/2017 5:09:07 PM - Microsoft VSIX Installer
9/5/2017 5:09:08 PM - -------------------------------------------
9/5/2017 5:09:08 PM - vsixinstaller.exe version:
9/5/2017 5:09:08 PM - 15.0.396+gef04a54a6a
9/5/2017 5:09:08 PM - -------------------------------------------
9/5/2017 5:09:08 PM - Command line parameters:
9/5/2017 5:09:08 PM - C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\Common7\IDE\VSIXInstaller.exe,C:\Users\zlyu\Downloads\NSpec.VsAdapter.vsix
9/5/2017 5:09:08 PM - -------------------------------------------
9/5/2017 5:09:08 PM - Microsoft VSIX Installer
9/5/2017 5:09:08 PM - -------------------------------------------
9/5/2017 5:09:08 PM - Initializing Install...
9/5/2017 5:09:08 PM - Extension Details...
9/5/2017 5:09:08 PM - 	Identifier         : BrainCrumbz.NSpec.VsAdapter
9/5/2017 5:09:08 PM - 	Name               : NSpec VS Adapter
9/5/2017 5:09:08 PM - 	Author             : BrainCrumbz
9/5/2017 5:09:08 PM - 	Version            : 1.0.0
9/5/2017 5:09:08 PM - 	Description        : A test adapter to run NSpec tests from Test Explorer window in Visual Studio 2013 and later.
9/5/2017 5:09:08 PM - 	Locale             : en-US
9/5/2017 5:09:08 PM - 	MoreInfoURL        : https://github.com/nspec/NSpec.VsAdapter
9/5/2017 5:09:08 PM - 	InstalledByMSI     : False
9/5/2017 5:09:08 PM - 	SupportedFrameworkVersionRange : [4.5,)
9/5/2017 5:09:08 PM - 
9/5/2017 5:09:08 PM - 	SignatureState     : Unsigned
9/5/2017 5:09:08 PM - 	Supported Products : 
9/5/2017 5:09:08 PM - 		Microsoft.VisualStudio.Pro
9/5/2017 5:09:08 PM - 			Version : [12.0,14.0]
9/5/2017 5:09:08 PM - 
9/5/2017 5:09:08 PM - 	References         : 
9/5/2017 5:09:08 PM - Signature Details...
9/5/2017 5:09:08 PM - 	Extension is not signed.
9/5/2017 5:09:08 PM - 
9/5/2017 5:09:08 PM - Searching for applicable products...
9/5/2017 5:09:08 PM - Found installed product - Global Location
9/5/2017 5:09:08 PM - Found installed product - Visual Studio Community 2017
9/5/2017 5:09:08 PM - VSIXInstaller.NoApplicableSKUsException: This extension is not installable on any currently installed products.
   at VSIXInstaller.App.GetInstallableData(String vsixPath, Boolean isRepairSupported, IEnumerable`1& skuData)
   at VSIXInstaller.App.Initialize(Boolean isRepairSupported)
   at VSIXInstaller.App.Initialize()
   at System.Threading.Tasks.Task`1.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()

This looks similar to #2.

[BrainCrumbz]

I think this project readme is generating confusion and it may be a good time to fix that.

As a VSIX extension, it is available under VS2013 and VS2015. It is not yet available under VS 2017, as an extension. The marketplace/gallery description correctly reflects that.

But VS 2017 adds another mean to add test adapters to a solution: add it as a NuGet package to one of included projects. So that IDE is covered too, thanks to the NuGet package.

For a working setup, please have a look at examples/NetFrameworkSample solution, specifically at test project's packages.config: <package id="NSpec.VsAdapter" version="1.0.0" targetFramework="net452" developmentDependency="true" />.
For instructions, please have a look at NuGet Package section in readme.

Again, just remember that this Adapter at the moment only works for classic .NET framework projects, not .NET Core ones.

[BrainCrumbz]

For the records: we updated readme description.
For unrelated reasons (change of publisher) we also are in the process of temporarily removing the extension from marketplace and adding it again under a new publisher and/or ID.