1.0.0-alpha.19

• Added StartProcess.WithArgument() methods to add arguments to the module using a fluent interface.
• Added Config<TValue>.CombineWith() extensions for combining two configs.
• Added Config<TValue>.Transform() extensions for transforming from one value to another.
• Made IExecutionContext (re)implement IMetadata through Settings.
• Added ToString() overloads to IFileSystemEntry (can't believe those weren't already there).
• Added a Statiq.Netlify extension with a DeployNetlifySite module.
• IDocument now implements IContentProviderFactory.
• Added some additional IContentProvider overloads to the DeployAppService module.