Update readme for 1.15

Author: DustinCampbell

README.md

@@ -20,17 +20,17 @@ The C# extension is powered by [OmniSharp](https://github.com/OmniSharp/omnishar
 * [Documentation](https://code.visualstudio.com/docs/languages/csharp)
 * [Video Tutorial compiling with .NET Core](https://channel9.msdn.com/Blogs/dotnet/Get-started-VSCode-Csharp-NET-Core-Windows)
 
-### What's New in 1.14.0
-
-* Support for C# 7.2
-* Debugger support for extracting source files embedded in PDBs
-* Preliminary support for Linux ARM debugging
-* Improved Symbol/Documentation text display
-* Addressed problems with projects not being refreshed by OmniSharp after a package restore
-* Added option to disable warning about project.json deprecation
+### What's New in 1.15.0
+
+* Debugger support for Source Link and Symbol Servers
+* Added support for downloading and launching prerelease versions of the OmniSharp server
+* Improved the status bar display for OmniSharp Server and selected project information
+* Added CodeLens for running and debugging all tests in a test class
+* Performance improvements when OmniSharp scans for projects
+* Improvements for projects containing XAML files
 * Many other bug fixes!
 
-See our [change log](https://github.com/OmniSharp/omnisharp-vscode/blob/v1.14.0/CHANGELOG.md) for all of the updates.
+See our [change log](https://github.com/OmniSharp/omnisharp-vscode/blob/v1.15.0/CHANGELOG.md) for more detail.
 
 ### Supported Operating Systems for Debugging
 
@@ -47,16 +47,18 @@ See our [change log](https://github.com/OmniSharp/omnisharp-vscode/blob/v1.14.0/
 This list is currently the same as the x64 .NET Core 2.0 operating systems (see [.NET Core list](https://github.com/dotnet/core/blob/master/roadmap.md#net-core-20---supported-os-versions)). Note that other Linux distributions will likely work as well as long as they include glibc, OpenSSL 1.0, and libunwind.
 
 ### Found a Bug?
+
 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.
 
 ### Development
 
 First install:
-* Node.js (newer than 4.3.1)
-* Npm (newer 2.14.12)
+* Node.js (8.11.1 or later)
+* Npm (5.6.0 or later)
 
 To **run and develop** do the following: