Add Roslyn version 3.4.0.1947701 binaries from the vsix (#16)

.. corresponding to the nuget Microsoft.Net.Compilers
3.4.0-beta2-19477-01 .

Version taken from
https://github.com/dotnet/toolset/blob//e9c6794f1f124e273571237eb72a949ee5c950c6/eng/Versions.props#L36
current HEAD of `release/3.1.1xx` branch.

- Removed these from the vsix:
	- [Content_Types].xml
	- catalog.json
	- extension.vsixmanifest
	- manifest.json
	- Roslyn.Compilers.Extension.* (windows/VS specific)
	- skipped package/* directory

- Edited `csi.rsp` with (matches what we used for 3.3.1):

```
-/r:System
-/r:System.Core
-/r:Microsoft.CSharp
+/r:System.dll
+/r:System.Core.dll
+/r:Microsoft.CSharp.dll
+/r:Facades/System.Runtime.dll
+/r:Facades/netstandard.dll
/u:System
/u:System.IO
/u:System.Collections.Generic
```

1 files changed, 46 insertions, 0 deletions

diff --git a/Microsoft.Net.Compilers/3.4.0/csc.rsp b/Microsoft.Net.Compilers/3.4.0/csc.rsp
new file mode 100644
index 0000000..ce72ac6
--- /dev/null
+++ b/Microsoft.Net.Compilers/3.4.0/csc.rsp
@@ -0,0 +1,46 @@
+# Copyright (c)  Microsoft.  All Rights Reserved.  Licensed under the Apache License, Version 2.0.  See License.txt in the project root for license information.
+
+# This file contains command-line options that the C#
+# command line compiler (CSC) will process as part
+# of every compilation, unless the "/noconfig" option
+# is specified. 
+
+# Reference the common Framework libraries
+/r:Accessibility.dll
+/r:Microsoft.CSharp.dll
+/r:System.Configuration.dll
+/r:System.Configuration.Install.dll
+/r:System.Core.dll
+/r:System.Data.dll
+/r:System.Data.DataSetExtensions.dll
+/r:System.Data.Linq.dll
+/r:System.Data.OracleClient.dll
+/r:System.Deployment.dll
+/r:System.Design.dll
+/r:System.DirectoryServices.dll
+/r:System.dll
+/r:System.Drawing.Design.dll
+/r:System.Drawing.dll
+/r:System.EnterpriseServices.dll
+/r:System.Management.dll
+/r:System.Messaging.dll
+/r:System.Runtime.Remoting.dll
+/r:System.Runtime.Serialization.dll
+/r:System.Runtime.Serialization.Formatters.Soap.dll
+/r:System.Security.dll
+/r:System.ServiceModel.dll
+/r:System.ServiceModel.Web.dll
+/r:System.ServiceProcess.dll
+/r:System.Transactions.dll
+/r:System.Web.dll
+/r:System.Web.Extensions.Design.dll
+/r:System.Web.Extensions.dll
+/r:System.Web.Mobile.dll
+/r:System.Web.RegularExpressions.dll
+/r:System.Web.Services.dll
+/r:System.Windows.Forms.dll
+/r:System.Workflow.Activities.dll
+/r:System.Workflow.ComponentModel.dll
+/r:System.Workflow.Runtime.dll
+/r:System.Xml.dll
+/r:System.Xml.Linq.dll