Add AppVeyor configuration and disable Travis for now

Author: dougbu

.appveyor.yml

@@ -0,0 +1,20 @@
+init:
+  - git config --global core.autocrlf true
+branches:
+  only:
+    - master
+    - /^(.*\/)?ci-.*$/
+    - /^rel\/.*/
+configuration:
+  - CodeAnalysis
+  - Release
+matrix:
+  fast_finish: true
+before_build:
+  - cmd: .\build.cmd EnableSkipStrongNames
+build_script:
+  - cmd: .\build.cmd UnitTest /P:Configuration=%Configuration%
+clone_depth: 1
+test: off
+deploy: off
+os: Visual Studio 2017

.travis.yml

@@ -0,0 +1,11 @@
+language: csharp
+sudo: false
+dist: trusty
+mono: none
+os:
+  - linux
+branches:
+  only:
+   - not.a.branch
+script:
+  - echo Skipping builds for now.

README.md

@@ -1,6 +1,8 @@
 ASP.NET MVC, Web API, Web Pages, and Razor
 ===
 
+AppVeyor: [![AppVeyor](https://ci.appveyor.com/api/projects/status/github/aspnet/aspnetwebstack?branch=master&svg=true)](https://ci.appveyor.com/project/aspnetci/aspnetwebstack/branch/master)
+
 ## Note: This repo is for ASP.NET MVC 5.x, Web API 2.x, and Web Pages 3.x. For ASP.NET Core MVC, check the [MVC repo](https://github.com/aspnet/Mvc).
 
 ASP.NET MVC is a web framework that gives you a powerful, patterns-based way to build dynamic websites and Web APIs. ASP.NET MVC enables a clean separation of concerns and gives you full control over markup.