Visual C++ build tools workload for Visual Studio 2017 Build Tools

### Overview

This package adds the Visual C++ build tools workload to an existing installation of Visual Studio 2017 Build Tools.

The list of components included in this workload is shown [here](https://docs.microsoft.com/en-us/visualstudio/install/workload-component-id-vs-build-tools?view=vs-2017#visual-c-build-tools).

Visual Studio 2017 Build Tools must be installed first, for example using the Chocolatey package [visualstudio2017buildtools](https://chocolatey.org/packages/visualstudio2017buildtools).

### Customizations

The package passes all package parameters to the Visual Studio installer, enabling full customization of the installation. The possible parameters are [described here](https://docs.microsoft.com/en-us/visualstudio/install/use-command-line-parameters-to-install-visual-studio). The package passes `--norestart --includeRecommended` by default, and `--quiet`, unless `--passive` is specified in the package parameters.

By default, the package installs components required by and recommended for the workload. Package parameters can be used to adjust this behavior:

- `--no-includeRecommended` - Does not include the recommended components.
- `--includeOptional` - Includes the optional components.

Example 1. Installing the workload, including recommended, but not optional components:

choco install visualstudio2017-workload-vctools --package-parameters "--includeRecommended"

Example 2. Installing the workload, including all recommended and optional components:

choco install visualstudio2017-workload-vctools --package-parameters "--includeOptional"

Example 3. Installing the workload, including only required components:

choco install visualstudio2017-workload-vctools --package-parameters "--no-includeRecommended"

[More package parameter examples](https://github.com/jberezanski/ChocolateyPackages/blob/master/chocolatey-visualstudio.extension/EXAMPLES.md)