Build: no longer pause at end of FAKE build (build.cmd)

appveyor.yml

@@ -1,3 +1,6 @@
+os: Windows Server 2012 R2
 build_script:
-  - ps: .\build.cmd Build
+  - cmd: build.cmd Build
 test: off
+deploy: off
+shallow_clone: true

build.cmd

@@ -4,4 +4,3 @@ if not exist packages\FAKE\tools\FAKE.exe (
   .nuget\NuGet.exe install FAKE -OutputDirectory packages -ExcludeVersion
 )
 packages\FAKE\tools\FAKE.exe build.fsx %*
-pause