Updating readme links for CTP 5 Part 2

Added a space after the "5" in CTP 5.  Corrected a mistype to say "CTP
5" instead of "Preview"

README.md

@@ -36,12 +36,12 @@ to get the Visual Studio project templates.
 to get a [Syntax Visualizer tool window](https://github.com/dotnet/roslyn/wiki/Syntax%20Visualizer) 
 to help explore the syntax trees you'll be analyzing.
 
-To get started on **Visual Studio 2015 CTP5**:
+To get started on **Visual Studio 2015 CTP 5**:
 
-1. Set up a box with Visual Studio 2015 CPT5. Either 
-[install  Visual Studio 2015 Preview](http://go.microsoft.com/fwlink/?LinkId=400496), 
+1. Set up a box with Visual Studio 2015 CPT 5. Either 
+[install  Visual Studio 2015 CTP 5](http://go.microsoft.com/fwlink/?LinkId=400496), 
 or grab a [prebuilt Azure VM image](http://blogs.msdn.com/b/visualstudioalm/archive/2014/06/04/visual-studio-14-ctp-now-available-in-the-virtual-machine-azure-gallery.aspx).
-2. Install the [Visual Studio 2015 CTP5 SDK](http://go.microsoft.com/fwlink/?LinkId=400496). 
+2. Install the [Visual Studio 2015 CTP 5 SDK](http://go.microsoft.com/fwlink/?LinkId=400496). 
 You'll need to do this even if you're using the Azure VM image. 
 3. Install the [SDK Templates VSIX package](https://visualstudiogallery.msdn.microsoft.com/ae1cf421-54bf-4406-b48c-76a182819fb7) 
 to get the Visual Studio project templates.