Add "What's new" section and update debugger docs with new features (#396)

Author: gregg-miskelly

README.md

@@ -24,6 +24,17 @@ Please file any issues at https://github.com/OmniSharp/omnisharp-vscode/issues.
 ### Debugging
 The C# extension now supports basic debugging capabilities! See http://aka.ms/vscclrdebugger for details.
 
+### What's new in C# extension version 1.1
+
+* Preliminary support for `dotnet test`
+* Fix for OmniSharp installation problems on networks with an http proxy
+* Debugger support for an external console
+* Debugger support for environment variables
+* Support for debugging .NET Core 1.0.0 post RC2 builds
+* Automatic web vs. console debugger configuration detection
+* Detach support
+* Fix expression evaluation errors when referencing assemblies which aren't currently loaded
+
 ### Development
 
 First install:

debugger.md

@@ -116,9 +116,23 @@ You can optionally configure a file by file mapping by providing map following t
 
     "sourceFileMap": {
         "C:\foo":"/home/me/foo"
-        }
+    }
 
 #####Symbol Path
 You can optionally provide paths to symbols following this schema:
 
     "symbolPath":"[ \"/Volumes/symbols\"]"
+
+#####Environment variables
+Environment variables may be passed to your program using this schema:
+
+    "env": {
+        "myVariableName":"theValueGoesHere"
+    }
+
+#####External console (terminal) window
+The target process can optionally launch into a seperate console window. This is enabled by default for non-ASP.NET applications. But it can be explicitly set with:
+
+    "externalConsole": true
+
+If your console app doesn't take console input (ex: all input comes from the command line), you may want to turn this off.