ChakraShim implements essential V8 APIs needed by Node.js on top of the
Chakra runtime hosting API (JSRT). This enables Node.js and other native
addon modules written for V8 to build and run with the Chakra JavaScript
engine.

Source code of [chakracore](https://github.com/Microsoft/ChakraCore.git)
that lights up Node.js for Chakra.
Building Node.js with Chakra produces chakracore.dll along with other binaries
that is needed by node.exe to function.

Enable building Node.js with chakracore engine for windows OS - x86, x64
and ARM.

* Configure to build Node.js with "v8" (default) or "chakracore" JS engine
   with optional vcbuild.bat switch.
* chakrashim uses js2c with a namespace.
* Configure msvs_use_library_dependency_inputs to export symbols
   correctly (otherwise functions not used by node.exe but might be
   needed by native addon modules could be optimized away by linker).
* Add parameter `arm` to `vcbuild.bat` that will pass `--openssl-no-asm`
* Introduced `msvs_windows_target_platform_version` to be used to set
   Windows SDK for ARM.

Add support to allow node.js build with chakracore enigne for Windows OS
x86/x64 architecture.

* Enables building native addon modules for Node.js with multiple
   node-engines.
* Configure msvs_use_library_dependency_inputs to export symbols
   correctly (otherwise functions not used by node.exe but might be
   needed by native addon modules could be optimized away by linker).

Add support to allow node.js build with chakracore enigne for Windows OS
x86/x64 architecture.

* Configure msvs_use_library_dependency_inputs to export symbols
   correctly (otherwise functions not used by node.exe but might be
   needed by native addon modules could be optimized away by linker).

* Support building node.js with chakracore on Windows on ARM
* Building chakracore for ARM has a dependency on Windows SDK installed
on the machine. Update python script to populate
`WindowsSDKDesktopARMSupport` and `WindowsTargetPlatformVersion`
for ARM builds by configuring msvs_windows_target_platform_version. This
will be used in `chakracore.gyp` to pass as parameter to `msbuild.exe`.

* Support building node.js with chakracore on Windows on ARM
* Building chakracore for ARM has a dependency on Windows SDK installed
on the machine. Update python script to populate
`WindowsSDKDesktopARMSupport` and `WindowsTargetPlatformVersion`
for ARM builds by configuring msvs_windows_target_platform_version. This
will be used in `chakracore.gyp` to pass as parameter to `msbuild.exe`.

* Add runtime property "process.jsEngine" to indicate current JS engine
   node runs on (JS engine is determined at build time).
* Update REPL to work with Chakra engine.
* Buffer/SlowBuffer currently does not support @@species constructor.
   Mark them as such to avoid failure as per ES6 TypedArray @@species spec.
* Minor fix in `string_bytes.cc` because of way Chakra handles
   `String::NewExternal`.

There were certain unittest that depends specifically on v8 internals and/or
engine specific error message. This change adds if-else to expect different
error message for Chakra engine or skip running test case if it test v8
internals not present in Chakra or if it test features unimplemented by
chakrashim.

Modified test python script to take engine name depending on which it
will match the baselines for v8 vs. chakracore engine.