Merge pull request #1357 from sangshuduo/add-appveyor-ci-yml-file

add appveyor ci support

.appveyor.yml

+version: 1.0.{build}
+os: Visual Studio 2015
+environment:
+  matrix:
+    - ARCH: amd64
+
+clone_folder: c:\dev\TDengine
+clone_depth: 1
+
+init:
+  - call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" %ARCH%
+
+before_build:
+  - cd c:\dev\TDengine
+  - md build
+
+build_script:
+  - cd build
+  - cmake -G "NMake Makefiles" ..
+  - nmake install
+
+notifications:
+- provider: Email
+  to:
+  - sangshuduo@gmail.com
+  on_build_success: true
+  on_build_failure: true
+  on_build_status_changed: true