Introduce new Number case.

The new case aims at testing big number. Actually it doesn't check
if the deserializer parsed it. It only checkes if big numbers are
ignored.
Fix build script to handle msbuild zoombies.

The msbuild tries to optimize its performance and doesn't close
processes after the build. Therefore the Invoke-MsBuild PowerShell
module cannot determine if the build is finished and also hangs.
This patch adds no node reuse flag in order to instruct msbuild
to close the process after build.