Bump to v2.8 (VSTU 3) Preview

Added change log entry for the latest 2.8 release.
Added "real" versions for other previews (because this version number was exposed on the gallery and used for assembly versioning) and is the version reference for our customers.

cc @jbevain

Author: sailro

docs/cross-platform/change-log-visual-studio-tools-for-unity.md

@@ -31,7 +31,74 @@ translation.priority.mt:
 ---
 # Change Log (Visual Studio Tools for Unity)
 Visual Studio Tools for Unity change log.  
+
+## 2.8 (3.0 Preview)
+ Released 2016-11-17
+
+### New Features  
+  
+-   **General:**  
+  
+    -   Added Visual Studio 2017 installer support.
+  
+    -   Added Visual Studio 2017 extension support.
+    
+    -   Added localization support.    
+
+-   **Code Editor:**  
+
+    -   Added C# IntelliSense for Unity messages.
+  
+    -   Added C# code coloration for Unity messages.
+
+-   **Debugger:**  
+
+    -   Added support for `is`, `as`, direct cast, `default`, `new` expressions.
+    
+    -   Added support for string concat expressions.
+    
+    -   Added support for hexadecimal display of integer values.
+    
+    -   Added support for creating new temporary variables (statements).
+    
+    -   Added support for implicit primitive conversions.
+    
+    -   Added better error messages when a type is expected or not found.
+
+-   **Project Generation:**  
+
+    -   Removed the CSharp suffix from the project names.
+    
+    -   Removed reference to a system wide msbuild targets file.
+    
+-   **Wizards:**  
+  
+    -   Added support for Unity messages in non Behaviour types such as Editor or EditorWindow.
+    
+    -   Switched to Roslyn to inject and format Unity messages.
+    
+### Bug fixes  
+  
+-   **Debugger:**  
 
+    -   Fixed a bug crashing Unity when evaluating generic types.
+    
+    -   Fixed handling of nullable types.
+    
+    -   Fixed handling of enums.
+    
+    -   Fixed handling of nested member types.
+    
+    -   Fixed collection indexer access.
+    
+    -   Fixed support for debugging iterator frames with new C# compiler.
+
+-   **Project Generation:**  
+  
+    -   Fixed bug that prevented compilation when targeting the Unity Web player.
+    
+    -   Fixed bug that prevented compilation when compiling a script with a web encoded file name.
+
 ## 2.3  
  Released 2016-07-14  
 
@@ -170,7 +237,7 @@ Visual Studio Tools for Unity change log.
 
     -   Fixed inspecting empty arrays.  
 
-## 2.0 Preview 2  
+## 1.9.9 (2.0 Preview 2)
  Released 2015-04-02  
 
 ### New features  
@@ -259,7 +326,7 @@ Visual Studio Tools for Unity change log.
 
 -   **UI:** Support Visual Studio themes for context menu and icons.  
 
-## 2.0 Preview  
+## 1.9.8 (2.0 Preview)
  Released 2014-11-12  
 
 ### New features  
@@ -822,4 +889,4 @@ Visual Studio Tools for Unity change log.
 -   Fixed completion for dll inside the Asset folder for UnityScript and Boo.  
 
 ## 1.0 – Initial release  
- Released 2012-08-22
+ Released 2012-08-22