Build R-package with appveyor

ref:bc53363ba4a86edd1be3c4d9cce8265494337ba3

.appveyor.yml

@@ -62,4 +62,5 @@ build_script:
 
     if "%target%"=="exe" call ci\appveyor\build_apps.cmd
     if "%target%"=="whl" call ci\appveyor\build_whls.cmd
+    if "%target%"=="R" call ci\appveyor\build_r.cmd
    

ci/appveyor/build_r.cmd

@@ -0,0 +1,21 @@
+ ./ya make -r -T -o . .\catboost\R-package\src\
+cd catboost\R-package
+mkdir catboost
+cp DESCRIPTION catboost
+cp NAMESPACE catboost
+cp README.md catboost
+
+cp -r R catboost
+cp -r inst catboost
+cp -r man catboost
+cp -r tests catboost
+
+mkdir catboost\inst\libs
+mkdir catboost\inst\libs\x64
+cp src\libcatboostr.dll catboost\inst\libs\x64
+
+7z -ttar a dummy catboost -so | 7z -si -tgzip a catboost-R-Windows.tgz
+
+cd ..\..
+dir catboost\R-package
+python ci\webdav_upload.py catboost\R-package\catboost-R-Windows.tgz