[CI] Add building status and link of artifacts to README.

Related work item: Github microsoft#11

README.md

@@ -1,5 +1,10 @@
 # ShaderConductor
 
+[![Build status](https://ci.appveyor.com/api/projects/status/x7ni6wjrdbw4e86q/branch/master?svg=true)](https://ci.appveyor.com/project/gongminmin/shaderconductor/branch/master)
+[![Build Status](https://travis-ci.org/Microsoft/ShaderConductor.svg?branch=master)](https://travis-ci.org/Microsoft/ShaderConductor)
+[![License](https://img.shields.io/github/license/mashape/apistatus.svg)](LICENSE)
+
+
 ShaderConductor is a tool designed for cross-compiling HLSL to other shading languages.
 
 ## Features
@@ -49,12 +54,17 @@ This script automatically grabs external dependencies to External folder, genera
 ```
   mkdir Build
   cd Build
-  cmake -G "Visual Studio 15" -T v141,host=x64 -A x64 ../
+  cmake -G "Visual Studio 15" -T host=x64 -A x64 ../
   cmake --build .
 ```
 
 After building, the output file ShaderConductor.dll can be located in \<YourCMakeTargetFolder\>/Bin/\<Configuration\>/. It depends on dxcompiler.dll in the same folder.
 
+### Artifacts
+
+You can download the prebuilt binaries generated by CI system:
+* [Windows x64 Release](https://ci.appveyor.com/project/gongminmin/shaderconductor/branch/master/artifacts)
+
 ## License
 
 ShaderConductor is distributed under the terms of MIT License. See [LICENSE](LICENSE) for details.